68644746 has 40 divisors (see below), whose sum is σ = 154306944. Its totient is φ = 22808520.

The previous prime is 68644661. The next prime is 68644787. The reversal of 68644746 is 64744686.

68644746 = 101² + 102² + ... + 591².

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 79111 + ... + 79973.

Almost surely, 2^68644746 is an apocalyptic number.

68644746 is an abundant number, since it is smaller than the sum of its proper divisors (85662198).

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

68644746 is a wasteful number, since it uses less digits than its factorization.

68644746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 1359 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 68644746 is about 8285.2124897313. The cubic root of 68644746 is about 409.4514695135.

The spelling of 68644746 in words is "sixty-eight million, six hundred forty-four thousand, seven hundred forty-six".