61571231304 has 64 divisors (see below), whose sum is σ = 168033761280. Its totient is φ = 18645480000.

The previous prime is 61571231291. The next prime is 61571231327. The reversal of 61571231304 is 40313217516.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321729 + ... + 476079.

It is an arithmetic number, because the mean of its divisors is an integer number (2625527520).

Almost surely, 2^61571231304 is an apocalyptic number.

It is an amenable number.

61571231304 is an abundant number, since it is smaller than the sum of its proper divisors (106462529976).

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

61571231304 is a wasteful number, since it uses less digits than its factorization.

61571231304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155882 (or 155878 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 61571231304 in words is "sixty-one billion, five hundred seventy-one million, two hundred thirty-one thousand, three hundred four".