15677021952 has 216 divisors, whose sum is σ = 46734621024. Its totient is φ = 5050294272.

The previous prime is 15677021933. The next prime is 15677021963. The reversal of 15677021952 is 25912077651.

15677021952 is a `hidden beast` number, since 1 + 567 + 70 + 2 + 19 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 15677021898 and 15677021907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14747373 + ... + 14748435.

Almost surely, 2^15677021952 is an apocalyptic number.

15677021952 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 15677021952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23367310512).

15677021952 is an abundant number, since it is smaller than the sum of its proper divisors (31057599072).

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

15677021952 is a wasteful number, since it uses less digits than its factorization.

15677021952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The spelling of 15677021952 in words is "fifteen billion, six hundred seventy-seven million, twenty-one thousand, nine hundred fifty-two".