15857282052 has 18 divisors (see below), whose sum is σ = 40083685278. Its totient is φ = 5285760672.

The previous prime is 15857282047. The next prime is 15857282069. The reversal of 15857282052 is 25028275851.

15857282052 is a `hidden beast` number, since 1 + 5 + 8 + 572 + 8 + 20 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14430255876 + 1427026176 = 120126^2 + 37776^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 15857281989 and 15857282007.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220239993 + ... + 220240064.

Almost surely, 2^15857282052 is an apocalyptic number.

15857282052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15857282052 is an abundant number, since it is smaller than the sum of its proper divisors (24226403226).

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

15857282052 is a wasteful number, since it uses less digits than its factorization.

15857282052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440480067 (or 440480062 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 45.

The spelling of 15857282052 in words is "fifteen billion, eight hundred fifty-seven million, two hundred eighty-two thousand, fifty-two".