31555345356 has 36 divisors (see below), whose sum is σ = 80347138872. Its totient is φ = 10441669824.

The previous prime is 31555345343. The next prime is 31555345357. The reversal of 31555345356 is 65354355513.

31555345356 is a `hidden beast` number, since 3 + 1 + 5 + 553 + 45 + 3 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (31555345357) 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 11 ways as a sum of consecutive naturals, for example, 3194110 + ... + 3203973.

Almost surely, 2^31555345356 is an apocalyptic number.

31555345356 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31555345356 is an abundant number, since it is smaller than the sum of its proper divisors (48791793516).

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

31555345356 is a wasteful number, since it uses less digits than its factorization.

31555345356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398230 (or 6398225 counting only the distinct ones).

The product of its digits is 2025000, while the sum is 45.

The spelling of 31555345356 in words is "thirty-one billion, five hundred fifty-five million, three hundred forty-five thousand, three hundred fifty-six".