15621032452 has 24 divisors (see below), whose sum is σ = 28886457600. Its totient is φ = 7376356416.

The previous prime is 15621032447. The next prime is 15621032459. The reversal of 15621032452 is 25423012651.

It is not an unprimeable number, because it can be changed into a prime (15621032459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067377 + ... + 1081912.

It is an arithmetic number, because the mean of its divisors is an integer number (1203602400).

Almost surely, 2^15621032452 is an apocalyptic number.

It is an amenable number.

15621032452 is a deficient number, since it is larger than the sum of its proper divisors (13265425148).

15621032452 is a wasteful number, since it uses less digits than its factorization.

15621032452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149395 (or 2149393 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 15621032452 in words is "fifteen billion, six hundred twenty-one million, thirty-two thousand, four hundred fifty-two".