61570657507 has 16 divisors (see below), whose sum is σ = 65554152768. Its totient is φ = 57699241600.

The previous prime is 61570657481. The next prime is 61570657513. The reversal of 61570657507 is 70575607516.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61570657507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61570657807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818493 + ... + 890545.

It is an arithmetic number, because the mean of its divisors is an integer number (4097134548).

Almost surely, 2^61570657507 is an apocalyptic number.

61570657507 is a deficient number, since it is larger than the sum of its proper divisors (3983495261).

61570657507 is a wasteful number, since it uses less digits than its factorization.

61570657507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72830.

The product of its (nonzero) digits is 1543500, while the sum is 49.

The spelling of 61570657507 in words is "sixty-one billion, five hundred seventy million, six hundred fifty-seven thousand, five hundred seven".