15504255612 has 144 divisors (see below), whose sum is σ = 42607524960. Its totient is φ = 4734664704.

The previous prime is 15504255553. The next prime is 15504255659. The reversal of 15504255612 is 21655240551.

15504255612 is a `hidden beast` number, since 1 + 5 + 50 + 42 + 5 + 561 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9288714 + ... + 9290382.

It is an arithmetic number, because the mean of its divisors is an integer number (295885590).

Almost surely, 2^15504255612 is an apocalyptic number.

15504255612 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 15504255612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21303762480).

15504255612 is an abundant number, since it is smaller than the sum of its proper divisors (27103269348).

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

15504255612 is a wasteful number, since it uses less digits than its factorization.

15504255612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 15504255612 in words is "fifteen billion, five hundred four million, two hundred fifty-five thousand, six hundred twelve".