61745631656 has 32 divisors (see below), whose sum is σ = 119748283200. Its totient is φ = 29827378560.

The previous prime is 61745631641. The next prime is 61745631667. The reversal of 61745631656 is 65613654716.

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, 880046 + ... + 947613.

It is an arithmetic number, because the mean of its divisors is an integer number (3742133850).

Almost surely, 2^61745631656 is an apocalyptic number.

It is an amenable number.

61745631656 is a deficient number, since it is larger than the sum of its proper divisors (58002651544).

61745631656 is a wasteful number, since it uses less digits than its factorization.

61745631656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827809 (or 1827805 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 50.

The spelling of 61745631656 in words is "sixty-one billion, seven hundred forty-five million, six hundred thirty-one thousand, six hundred fifty-six".