78841606731 has 32 divisors (see below), whose sum is σ = 111728025600. Its totient is φ = 49313214720.

The previous prime is 78841606717. The next prime is 78841606751. The reversal of 78841606731 is 13760614887.

It is not a de Polignac number, because 78841606731 - 2²¹ = 78839509579 is a prime.

It is a super-2 number, since 2×78841606731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78841606751) 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, 4109421 + ... + 4128561.

It is an arithmetic number, because the mean of its divisors is an integer number (3491500800).

Almost surely, 2^78841606731 is an apocalyptic number.

78841606731 is a deficient number, since it is larger than the sum of its proper divisors (32886418869).

78841606731 is a wasteful number, since it uses less digits than its factorization.

78841606731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19859.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 78841606731 in words is "seventy-eight billion, eight hundred forty-one million, six hundred six thousand, seven hundred thirty-one".