31612538465 has 8 divisors (see below), whose sum is σ = 38025155688. Its totient is φ = 25229957760.

The previous prime is 31612538449. The next prime is 31612538473. The reversal of 31612538465 is 56483521613.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 976687504 + 30635850961 = 31252^2 + 175031^2 .

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

It is not a de Polignac number, because 31612538465 - 2⁴ = 31612538449 is a prime.

It is a super-2 number, since 2×31612538465² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7506812 + ... + 7511021.

It is an arithmetic number, because the mean of its divisors is an integer number (4753144461).

Almost surely, 2^31612538465 is an apocalyptic number.

It is an amenable number.

31612538465 is a deficient number, since it is larger than the sum of its proper divisors (6412617223).

31612538465 is a wasteful number, since it uses less digits than its factorization.

31612538465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15018259.

The product of its digits is 518400, while the sum is 44.

The spelling of 31612538465 in words is "thirty-one billion, six hundred twelve million, five hundred thirty-eight thousand, four hundred sixty-five".