31534730478 has 24 divisors (see below), whose sum is σ = 68672085768. Its totient is φ = 10458217392.

The previous prime is 31534730477. The next prime is 31534730609. The reversal of 31534730478 is 87403743513.

31534730478 is a `hidden beast` number, since 3 + 1 + 534 + 73 + 0 + 47 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31534730477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4442976 + ... + 4450067.

It is an arithmetic number, because the mean of its divisors is an integer number (2861336907).

Almost surely, 2^31534730478 is an apocalyptic number.

31534730478 is an abundant number, since it is smaller than the sum of its proper divisors (37137355290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31534730478 is a wasteful number, since it uses less digits than its factorization.

31534730478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8893248 (or 8893245 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 31534730478 in words is "thirty-one billion, five hundred thirty-four million, seven hundred thirty thousand, four hundred seventy-eight".