812570030040 has 64 divisors (see below), whose sum is σ = 2437770751200. Its totient is φ = 216679949312.

The previous prime is 812570030039. The next prime is 812570030087. The reversal of 812570030040 is 40030075218.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7889596 + ... + 7991924.

Almost surely, 2^812570030040 is an apocalyptic number.

It is an amenable number.

812570030040 is an abundant number, since it is smaller than the sum of its proper divisors (1625200721160).

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

812570030040 is a wasteful number, since it uses less digits than its factorization.

812570030040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168516 (or 168512 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 812570030040 in words is "eight hundred twelve billion, five hundred seventy million, thirty thousand, forty".