68136272761 has 16 divisors (see below), whose sum is σ = 72191995200. Its totient is φ = 64128742848.

The previous prime is 68136272753. The next prime is 68136272797. The reversal of 68136272761 is 16727263186.

It is not a de Polignac number, because 68136272761 - 2³ = 68136272753 is a prime.

It is a super-2 number, since 2×68136272761² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68136272461) 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, 2015151 + ... + 2048683.

It is an arithmetic number, because the mean of its divisors is an integer number (4511999700).

Almost surely, 2^68136272761 is an apocalyptic number.

It is an amenable number.

68136272761 is a deficient number, since it is larger than the sum of its proper divisors (4055722439).

68136272761 is a wasteful number, since it uses less digits than its factorization.

68136272761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34248.

The product of its digits is 1016064, while the sum is 49.

The spelling of 68136272761 in words is "sixty-eight billion, one hundred thirty-six million, two hundred seventy-two thousand, seven hundred sixty-one".