51396369120 has 72 divisors (see below), whose sum is σ = 175390114536. Its totient is φ = 13705698048.

The previous prime is 51396369103. The next prime is 51396369137. The reversal of 51396369120 is 2196369315.

51396369120 is a `hidden beast` number, since 5 + 1 + 3 + 9 + 636 + 9 + 1 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51396369103) and next prime (51396369137).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17844522 + ... + 17847401.

It is an arithmetic number, because the mean of its divisors is an integer number (2435973813).

Almost surely, 2^51396369120 is an apocalyptic number.

It is an amenable number.

51396369120 is an abundant number, since it is smaller than the sum of its proper divisors (123993745416).

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

51396369120 is a wasteful number, since it uses less digits than its factorization.

51396369120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35691944 (or 35691933 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 51396369120 in words is "fifty-one billion, three hundred ninety-six million, three hundred sixty-nine thousand, one hundred twenty".