61570657506 has 16 divisors (see below), whose sum is σ = 123144881184. Its totient is φ = 20522958144.

The previous prime is 61570657481. The next prime is 61570657513. The reversal of 61570657506 is 60575607516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110650 + ... + 367946.

It is an arithmetic number, because the mean of its divisors is an integer number (7696555074).

Almost surely, 2^61570657506 is an apocalyptic number.

61570657506 is an abundant number, since it is smaller than the sum of its proper divisors (61574223678).

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

61570657506 is a wasteful number, since it uses less digits than its factorization.

61570657506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297185.

The product of its (nonzero) digits is 1323000, while the sum is 48.

The spelling of 61570657506 in words is "sixty-one billion, five hundred seventy million, six hundred fifty-seven thousand, five hundred six".