68911550951 has 4 divisors (see below), whose sum is σ = 70079543400. Its totient is φ = 67743558504.

The previous prime is 68911550893. The next prime is 68911550969. The reversal of 68911550951 is 15905511986.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68911550951 - 2²² = 68907356647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68911550951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68911550971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583996136 + ... + 583996253.

It is an arithmetic number, because the mean of its divisors is an integer number (17519885850).

Almost surely, 2^68911550951 is an apocalyptic number.

68911550951 is a deficient number, since it is larger than the sum of its proper divisors (1167992449).

68911550951 is a wasteful number, since it uses less digits than its factorization.

68911550951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167992448.

The product of its (nonzero) digits is 486000, while the sum is 50.

The spelling of 68911550951 in words is "sixty-eight billion, nine hundred eleven million, five hundred fifty thousand, nine hundred fifty-one".