68005738507 has 32 divisors (see below), whose sum is σ = 79944058880. Its totient is φ = 56649715200.

The previous prime is 68005738487. The next prime is 68005738519. The reversal of 68005738507 is 70583750086.

It is a cyclic number.

It is not a de Polignac number, because 68005738507 - 2²³ = 67997349899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68005738547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24260368 + ... + 24263170.

It is an arithmetic number, because the mean of its divisors is an integer number (2498251840).

Almost surely, 2^68005738507 is an apocalyptic number.

68005738507 is a deficient number, since it is larger than the sum of its proper divisors (11938320373).

68005738507 is a wasteful number, since it uses less digits than its factorization.

68005738507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 68005738507 in words is "sixty-eight billion, five million, seven hundred thirty-eight thousand, five hundred seven".