51674878620 has 36 divisors (see below), whose sum is σ = 156747132360. Its totient is φ = 13779967584.

The previous prime is 51674878601. The next prime is 51674878621. The reversal of 51674878620 is 2687847615.

51674878620 is a `hidden beast` number, since 5 + 1 + 6 + 7 + 4 + 8 + 7 + 8 + 620 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51674878621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143541150 + ... + 143541509.

It is an arithmetic number, because the mean of its divisors is an integer number (4354087010).

Almost surely, 2^51674878620 is an apocalyptic number.

It is an amenable number.

51674878620 is an abundant number, since it is smaller than the sum of its proper divisors (105072253740).

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

51674878620 is a wasteful number, since it uses less digits than its factorization.

51674878620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287082674 (or 287082669 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 51674878620 in words is "fifty-one billion, six hundred seventy-four million, eight hundred seventy-eight thousand, six hundred twenty".