51316271017620 has 48 divisors (see below), whose sum is σ = 164212067257728. Its totient is φ = 11729433375360.

The previous prime is 51316271017591. The next prime is 51316271017637. The reversal of 51316271017620 is 2671017261315.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61090798411 + ... + 61090799250.

It is an arithmetic number, because the mean of its divisors is an integer number (3421084734536).

Almost surely, 2^{51316271017620} is an apocalyptic number.

It is an amenable number.

51316271017620 is an abundant number, since it is smaller than the sum of its proper divisors (112895796240108).

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

51316271017620 is a wasteful number, since it uses less digits than its factorization.

51316271017620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122181597680 (or 122181597678 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

Adding to 51316271017620 its reverse (2671017261315), we get a palindrome (53987288278935).

The spelling of 51316271017620 in words is "fifty-one trillion, three hundred sixteen billion, two hundred seventy-one million, seventeen thousand, six hundred twenty".