68946191956 has 12 divisors (see below), whose sum is σ = 120657690580. Its totient is φ = 34472566080.

The previous prime is 68946191929. The next prime is 68946191969. The reversal of 68946191956 is 65919164986.

It can be written as a sum of positive squares in 2 ways, for example, as 32497272900 + 36448919056 = 180270^2 + 190916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384040 + ... + 534208.

Almost surely, 2^68946191956 is an apocalyptic number.

It is an amenable number.

68946191956 is a deficient number, since it is larger than the sum of its proper divisors (51711498624).

68946191956 is a wasteful number, since it uses less digits than its factorization.

68946191956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264954 (or 264952 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 64.

The spelling of 68946191956 in words is "sixty-eight billion, nine hundred forty-six million, one hundred ninety-one thousand, nine hundred fifty-six".