15730166772 has 18 divisors (see below), whose sum is σ = 39762366098. Its totient is φ = 5243388912.

The previous prime is 15730166743. The next prime is 15730166773. The reversal of 15730166772 is 27766103751.

15730166772 is a `hidden beast` number, since 1 + 573 + 0 + 1 + 6 + 6 + 7 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15468891876 + 261274896 = 124374^2 + 16164^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15730166773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218474503 + ... + 218474574.

Almost surely, 2^15730166772 is an apocalyptic number.

15730166772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15730166772 is an abundant number, since it is smaller than the sum of its proper divisors (24032199326).

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

15730166772 is a wasteful number, since it uses less digits than its factorization.

15730166772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436949087 (or 436949082 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The spelling of 15730166772 in words is "fifteen billion, seven hundred thirty million, one hundred sixty-six thousand, seven hundred seventy-two".