1615261020 has 96 divisors (see below), whose sum is σ = 4731471360. Its totient is φ = 410952960.

The previous prime is 1615261007. The next prime is 1615261027. The reversal of 1615261020 is 201625161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1615261027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634911 + ... + 637449.

It is an arithmetic number, because the mean of its divisors is an integer number (49286160).

Almost surely, 2^1615261020 is an apocalyptic number.

1615261020 is a gapful number since it is divisible by the number (10) 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 1615261020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2365735680).

1615261020 is an abundant number, since it is smaller than the sum of its proper divisors (3116210340).

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

1615261020 is a wasteful number, since it uses less digits than its factorization.

1615261020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3035 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1615261020 is about 40190.3100261742. The cubic root of 1615261020 is about 1173.3139590537.

Adding to 1615261020 its reverse (201625161), we get a palindrome (1816886181).

The spelling of 1615261020 in words is "one billion, six hundred fifteen million, two hundred sixty-one thousand, twenty".