15625887552 has 504 divisors, whose sum is σ = 53991662400. Its totient is φ = 4434186240.

The previous prime is 15625887547. The next prime is 15625887577. The reversal of 15625887552 is 25578852651.

15625887552 is a `hidden beast` number, since 1 + 5 + 6 + 2 + 5 + 8 + 87 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 78521949 + ... + 78522147.

Almost surely, 2^15625887552 is an apocalyptic number.

15625887552 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 15625887552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26995831200).

15625887552 is an abundant number, since it is smaller than the sum of its proper divisors (38365774848).

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

15625887552 is an equidigital number, since it uses as much as digits as its factorization.

15625887552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 232 counting only the distinct ones).

The product of its digits is 6720000, while the sum is 54.

The spelling of 15625887552 in words is "fifteen billion, six hundred twenty-five million, eight hundred eighty-seven thousand, five hundred fifty-two".