51885543777684 has 72 divisors (see below), whose sum is σ = 129932571867840. Its totient is φ = 16110004998144.

The previous prime is 51885543777673. The next prime is 51885543777829. The reversal of 51885543777684 is 48677734558815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76783344 + ... + 77456135.

It is an arithmetic number, because the mean of its divisors is an integer number (1804619053720).

Almost surely, 2^{51885543777684} is an apocalyptic number.

It is an amenable number.

51885543777684 is an abundant number, since it is smaller than the sum of its proper divisors (78047028090156).

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

51885543777684 is a wasteful number, since it uses less digits than its factorization.

51885543777684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154239617 (or 154239598 counting only the distinct ones).

The product of its digits is 6322176000, while the sum is 78.

The spelling of 51885543777684 in words is "fifty-one trillion, eight hundred eighty-five billion, five hundred forty-three million, seven hundred seventy-seven thousand, six hundred eighty-four".