15780032072 has 16 divisors (see below), whose sum is σ = 33814354560. Its totient is φ = 6762870864.

The previous prime is 15780032069. The next prime is 15780032123. The reversal of 15780032072 is 27023008751.

It is a super-2 number, since 2×15780032072² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140893088 + ... + 140893199.

It is an arithmetic number, because the mean of its divisors is an integer number (2113397160).

Almost surely, 2^15780032072 is an apocalyptic number.

It is an amenable number.

15780032072 is an abundant number, since it is smaller than the sum of its proper divisors (18034322488).

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

15780032072 is a wasteful number, since it uses less digits than its factorization.

15780032072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281786300 (or 281786296 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 15780032072 in words is "fifteen billion, seven hundred eighty million, thirty-two thousand, seventy-two".