31504623409 has 16 divisors (see below), whose sum is σ = 36963279360. Its totient is φ = 26288317440.

The previous prime is 31504623407. The next prime is 31504623503. The reversal of 31504623409 is 90432640513.

It is not a de Polignac number, because 31504623409 - 2¹ = 31504623407 is a prime.

It is a super-2 number, since 2×31504623409² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31504623407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14337 + ... + 251425.

It is an arithmetic number, because the mean of its divisors is an integer number (2310204960).

Almost surely, 2^31504623409 is an apocalyptic number.

It is an amenable number.

31504623409 is a deficient number, since it is larger than the sum of its proper divisors (5458655951).

31504623409 is a wasteful number, since it uses less digits than its factorization.

31504623409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237600.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 31504623409 in words is "thirty-one billion, five hundred four million, six hundred twenty-three thousand, four hundred nine".