68502479431 has 32 divisors (see below), whose sum is σ = 74468151296. Its totient is φ = 62868960000.

The previous prime is 68502479401. The next prime is 68502479443. The reversal of 68502479431 is 13497420586.

It is a happy number.

It is a 8-Lehmer number, since φ(68502479431) divides (68502479431-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 68502479431 - 2¹⁹ = 68501955143 is a prime.

It is a super-2 number, since 2×68502479431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68502479401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29640766 + ... + 29643076.

It is an arithmetic number, because the mean of its divisors is an integer number (2327129728).

It is a 2-persistent number, because it is pandigital, and so is 2⋅68502479431 = 137004958862, but 3⋅68502479431 = 205507438293 is not.

Almost surely, 2^68502479431 is an apocalyptic number.

68502479431 is a deficient number, since it is larger than the sum of its proper divisors (5965671865).

68502479431 is a wasteful number, since it uses less digits than its factorization.

68502479431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 68502479431 in words is "sixty-eight billion, five hundred two million, four hundred seventy-nine thousand, four hundred thirty-one".