31320446661245 has 12 divisors (see below), whose sum is σ = 43720786768284. Its totient is φ = 21476877710400.

The previous prime is 31320446661173. The next prime is 31320446661319. The reversal of 31320446661245 is 54216664402313.

It can be written as a sum of positive squares in 2 ways, for example, as 15455544273316 + 15864902387929 = 3931354^2 + 3983077^2 .

It is not a de Polignac number, because 31320446661245 - 2²⁸ = 31320178225789 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 31320446661245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63919278656 + ... + 63919279145.

It is an arithmetic number, because the mean of its divisors is an integer number (3643398897357).

Almost surely, 2^{31320446661245} is an apocalyptic number.

31320446661245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31320446661245 is a deficient number, since it is larger than the sum of its proper divisors (12400340107039).

31320446661245 is a wasteful number, since it uses less digits than its factorization.

31320446661245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127838557820 (or 127838557813 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 31320446661245 in words is "thirty-one trillion, three hundred twenty billion, four hundred forty-six million, six hundred sixty-one thousand, two hundred forty-five".