68350631391 has 48 divisors (see below), whose sum is σ = 115295192064. Its totient is φ = 38206026432.

The previous prime is 68350631353. The next prime is 68350631399. The reversal of 68350631391 is 19313605386.

68350631391 is a `hidden beast` number, since 6 + 8 + 3 + 5 + 0 + 631 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 68350631391 - 2⁹ = 68350630879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68350631399) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6784540 + ... + 6794606.

It is an arithmetic number, because the mean of its divisors is an integer number (2401983168).

Almost surely, 2^68350631391 is an apocalyptic number.

68350631391 is a deficient number, since it is larger than the sum of its proper divisors (46944560673).

68350631391 is a wasteful number, since it uses less digits than its factorization.

68350631391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12420 (or 12417 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 68350631391 in words is "sixty-eight billion, three hundred fifty million, six hundred thirty-one thousand, three hundred ninety-one".