31451664049 has 24 divisors (see below), whose sum is σ = 34701591672. Its totient is φ = 28487047680.

The previous prime is 31451664047. The next prime is 31451664053. The reversal of 31451664049 is 94046615413.

It can be written as a sum of positive squares in 12 ways, for example, as 2624717824 + 28826946225 = 51232^2 + 169785^2 .

It is not a de Polignac number, because 31451664049 - 2¹ = 31451664047 is a prime.

It is a super-3 number, since 3×31451664049³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31451663996 and 31451664014.

It is not an unprimeable number, because it can be changed into a prime (31451664043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2423919 + ... + 2436859.

It is an arithmetic number, because the mean of its divisors is an integer number (1445899653).

Almost surely, 2^31451664049 is an apocalyptic number.

It is an amenable number.

31451664049 is a deficient number, since it is larger than the sum of its proper divisors (3249927623).

31451664049 is a wasteful number, since it uses less digits than its factorization.

31451664049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13237 (or 13224 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 31451664049 in words is "thirty-one billion, four hundred fifty-one million, six hundred sixty-four thousand, forty-nine".