15515241012 has 96 divisors (see below), whose sum is σ = 42637795200. Its totient is φ = 4862163456.

The previous prime is 15515240999. The next prime is 15515241023. The reversal of 15515241012 is 21014251551.

It is a happy number.

15515241012 is a `hidden beast` number, since 1 + 551 + 5 + 2 + 4 + 101 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1866738 + ... + 1875030.

It is an arithmetic number, because the mean of its divisors is an integer number (444143700).

Almost surely, 2^15515241012 is an apocalyptic number.

15515241012 is a gapful number since it is divisible by the number (12) 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 15515241012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21318897600).

15515241012 is an abundant number, since it is smaller than the sum of its proper divisors (27122554188).

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

15515241012 is a wasteful number, since it uses less digits than its factorization.

15515241012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342 (or 9334 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 15515241012 its reverse (21014251551), we get a palindrome (36529492563).

The spelling of 15515241012 in words is "fifteen billion, five hundred fifteen million, two hundred forty-one thousand, twelve".