813400734136 has 64 divisors (see below), whose sum is σ = 1657407044160. Its totient is φ = 372722688000.

The previous prime is 813400734109. The next prime is 813400734137. The reversal of 813400734136 is 631437004318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813400734137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2765101 + ... + 3045091.

It is an arithmetic number, because the mean of its divisors is an integer number (25896985065).

Almost surely, 2^813400734136 is an apocalyptic number.

It is an amenable number.

813400734136 is an abundant number, since it is smaller than the sum of its proper divisors (844006310024).

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

813400734136 is a wasteful number, since it uses less digits than its factorization.

813400734136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280576 (or 280572 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

It can be divided in two parts, 813400 and 734136, that added together give a square (1547536 = 1244²).

The spelling of 813400734136 in words is "eight hundred thirteen billion, four hundred million, seven hundred thirty-four thousand, one hundred thirty-six".