68949811492 has 6 divisors (see below), whose sum is σ = 120662170118. Its totient is φ = 34474905744.

The previous prime is 68949811481. The next prime is 68949811517. The reversal of 68949811492 is 29411894986.

It can be written as a sum of positive squares in only one way, i.e., 60607546596 + 8342264896 = 246186^2 + 91336^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68949811492.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8618726433 + ... + 8618726440.

Almost surely, 2^68949811492 is an apocalyptic number.

It is an amenable number.

68949811492 is a deficient number, since it is larger than the sum of its proper divisors (51712358626).

68949811492 is a wasteful number, since it uses less digits than its factorization.

68949811492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237452877 (or 17237452875 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 61.

The spelling of 68949811492 in words is "sixty-eight billion, nine hundred forty-nine million, eight hundred eleven thousand, four hundred ninety-two".