68401670672 has 10 divisors (see below), whose sum is σ = 132528236958. Its totient is φ = 34200835328.

The previous prime is 68401670641. The next prime is 68401670677. The reversal of 68401670672 is 27607610486.

It is a happy number.

68401670672 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 only one way, i.e., 68269328656 + 132342016 = 261284^2 + 11504^2 .

It is not an unprimeable number, because it can be changed into a prime (68401670677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2137552193 + ... + 2137552224.

Almost surely, 2^68401670672 is an apocalyptic number.

It is an amenable number.

68401670672 is a deficient number, since it is larger than the sum of its proper divisors (64126566286).

68401670672 is a wasteful number, since it uses less digits than its factorization.

68401670672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275104425 (or 4275104419 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 68401670672 in words is "sixty-eight billion, four hundred one million, six hundred seventy thousand, six hundred seventy-two".