68839781501 has 16 divisors (see below), whose sum is σ = 73103385600. Its totient is φ = 64708963200.

The previous prime is 68839781449. The next prime is 68839781567. The reversal of 68839781501 is 10518793886.

It is a cyclic number.

It is not a de Polignac number, because 68839781501 - 2¹⁴ = 68839765117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68839787501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509096 + ... + 629966.

It is an arithmetic number, because the mean of its divisors is an integer number (4568961600).

Almost surely, 2^68839781501 is an apocalyptic number.

It is an amenable number.

68839781501 is a deficient number, since it is larger than the sum of its proper divisors (4263604099).

68839781501 is a wasteful number, since it uses less digits than its factorization.

68839781501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121420.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 68839781501 in words is "sixty-eight billion, eight hundred thirty-nine million, seven hundred eighty-one thousand, five hundred one".