31649670769 has 8 divisors (see below), whose sum is σ = 31793172320. Its totient is φ = 31506463296.

The previous prime is 31649670761. The next prime is 31649670779. The reversal of 31649670769 is 96707694613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31649670769 - 2³ = 31649670761 is a prime.

It is a super-2 number, since 2×31649670769² (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 (31649670761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143662 + ... + 289720.

It is an arithmetic number, because the mean of its divisors is an integer number (3974146540).

Almost surely, 2^31649670769 is an apocalyptic number.

It is an amenable number.

31649670769 is a deficient number, since it is larger than the sum of its proper divisors (143501551).

31649670769 is a wasteful number, since it uses less digits than its factorization.

31649670769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147039.

The product of its (nonzero) digits is 10287648, while the sum is 58.

The spelling of 31649670769 in words is "thirty-one billion, six hundred forty-nine million, six hundred seventy thousand, seven hundred sixty-nine".