1615112023428 has 144 divisors (see below), whose sum is σ = 4195195804800. Its totient is φ = 523771960320.

The previous prime is 1615112023397. The next prime is 1615112023429. The reversal of 1615112023428 is 8243202115161.

1615112023428 is a `hidden beast` number, since 1 + 6 + 15 + 11 + 202 + 3 + 428 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1615112023392 and 1615112023401.

It is not an unprimeable number, because it can be changed into a prime (1615112023429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66129403 + ... + 66153821.

It is an arithmetic number, because the mean of its divisors is an integer number (29133304200).

Almost surely, 2^{1615112023428} is an apocalyptic number.

1615112023428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1615112023428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2097597902400).

1615112023428 is an abundant number, since it is smaller than the sum of its proper divisors (2580083781372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1615112023428 is a wasteful number, since it uses less digits than its factorization.

1615112023428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24842 (or 24837 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

Adding to 1615112023428 its reverse (8243202115161), we get a palindrome (9858314138589).

The spelling of 1615112023428 in words is "one trillion, six hundred fifteen billion, one hundred twelve million, twenty-three thousand, four hundred twenty-eight".