51342432856 has 64 divisors (see below), whose sum is σ = 114785153280. Its totient is φ = 21220721280.

The previous prime is 51342432821. The next prime is 51342432857. The reversal of 51342432856 is 65823424315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51342432857) 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, 258276 + ... + 411571.

It is an arithmetic number, because the mean of its divisors is an integer number (1793518020).

Almost surely, 2^51342432856 is an apocalyptic number.

It is an amenable number.

51342432856 is an abundant number, since it is smaller than the sum of its proper divisors (63442720424).

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

51342432856 is a wasteful number, since it uses less digits than its factorization.

51342432856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669944 (or 669940 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 51342432856 in words is "fifty-one billion, three hundred forty-two million, four hundred thirty-two thousand, eight hundred fifty-six".