31405704465 has 16 divisors (see below), whose sum is σ = 50374446336. Its totient is φ = 16707936000.

The previous prime is 31405704457. The next prime is 31405704487. The reversal of 31405704465 is 56440750413.

It is a happy number.

It is not a de Polignac number, because 31405704465 - 2³ = 31405704457 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2604601 + ... + 2616630.

It is an arithmetic number, because the mean of its divisors is an integer number (3148402896).

Almost surely, 2^31405704465 is an apocalyptic number.

It is an amenable number.

31405704465 is a deficient number, since it is larger than the sum of its proper divisors (18968741871).

31405704465 is a wasteful number, since it uses less digits than its factorization.

31405704465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5221640.

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 31405704465 in words is "thirty-one billion, four hundred five million, seven hundred four thousand, four hundred sixty-five".