68898721894 has 32 divisors (see below), whose sum is σ = 107823371040. Its totient is φ = 32995372032.

The previous prime is 68898721883. The next prime is 68898721921. The reversal of 68898721894 is 49812789886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871392 + ... + 947164.

It is an arithmetic number, because the mean of its divisors is an integer number (3369480345).

Almost surely, 2^68898721894 is an apocalyptic number.

68898721894 is a deficient number, since it is larger than the sum of its proper divisors (38924649146).

68898721894 is a wasteful number, since it uses less digits than its factorization.

68898721894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76024.

The product of its digits is 111476736, while the sum is 70.

The spelling of 68898721894 in words is "sixty-eight billion, eight hundred ninety-eight million, seven hundred twenty-one thousand, eight hundred ninety-four".