68494690953 has 24 divisors (see below), whose sum is σ = 106618933512. Its totient is φ = 42122239488.

The previous prime is 68494690951. The next prime is 68494690963. The reversal of 68494690953 is 35909649486.

68494690953 is a `hidden beast` number, since 6 + 8 + 494 + 6 + 90 + 9 + 53 = 666.

68494690953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5810555529 + 62684135424 = 76227^2 + 250368^2 .

It is not a de Polignac number, because 68494690953 - 2¹ = 68494690951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68494690951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21376 + ... + 370737.

It is an arithmetic number, because the mean of its divisors is an integer number (4442455563).

Almost surely, 2^68494690953 is an apocalyptic number.

It is an amenable number.

68494690953 is a deficient number, since it is larger than the sum of its proper divisors (38124242559).

68494690953 is a wasteful number, since it uses less digits than its factorization.

68494690953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393625 (or 393622 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 63.

The spelling of 68494690953 in words is "sixty-eight billion, four hundred ninety-four million, six hundred ninety thousand, nine hundred fifty-three".