31344777157 has 16 divisors (see below), whose sum is σ = 33812553600. Its totient is φ = 28950400512.

The previous prime is 31344777151. The next prime is 31344777161. The reversal of 31344777157 is 75177744313.

It is not a de Polignac number, because 31344777157 - 2¹¹ = 31344775109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31344777157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31344777151) 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 15 ways as a sum of consecutive naturals, for example, 183498 + ... + 310420.

It is an arithmetic number, because the mean of its divisors is an integer number (2113284600).

Almost surely, 2^31344777157 is an apocalyptic number.

It is an amenable number.

31344777157 is a deficient number, since it is larger than the sum of its proper divisors (2467776443).

31344777157 is a wasteful number, since it uses less digits than its factorization.

31344777157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127212.

The product of its digits is 1728720, while the sum is 49.

The spelling of 31344777157 in words is "thirty-one billion, three hundred forty-four million, seven hundred seventy-seven thousand, one hundred fifty-seven".