31007744961 has 16 divisors (see below), whose sum is σ = 41469402816. Its totient is φ = 20609055936.

The previous prime is 31007744959. The next prime is 31007744993. The reversal of 31007744961 is 16944770013.

It is not a de Polignac number, because 31007744961 - 2¹ = 31007744959 is a prime.

It is a super-2 number, since 2×31007744961² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31007724961) 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, 1336486 + ... + 1359488.

It is an arithmetic number, because the mean of its divisors is an integer number (2591837676).

Almost surely, 2^31007744961 is an apocalyptic number.

It is an amenable number.

31007744961 is a deficient number, since it is larger than the sum of its proper divisors (10461657855).

31007744961 is a wasteful number, since it uses less digits than its factorization.

31007744961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24352.

The product of its (nonzero) digits is 127008, while the sum is 42.

The spelling of 31007744961 in words is "thirty-one billion, seven million, seven hundred forty-four thousand, nine hundred sixty-one".