51551116630651 has 8 divisors (see below), whose sum is σ = 57545432518464. Its totient is φ = 45774775866120.

The previous prime is 51551116630633. The next prime is 51551116630679. The reversal of 51551116630651 is 15603661115515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51551116630651 is a prime.

It is a super-2 number, since 2×51551116630651² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51551116630621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54493780321 + ... + 54493781266.

It is an arithmetic number, because the mean of its divisors is an integer number (7193179064808).

Almost surely, 2^{51551116630651} is an apocalyptic number.

51551116630651 is a deficient number, since it is larger than the sum of its proper divisors (5994315887813).

51551116630651 is a wasteful number, since it uses less digits than its factorization.

51551116630651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108987561641.

The product of its (nonzero) digits is 405000, while the sum is 46.

The spelling of 51551116630651 in words is "fifty-one trillion, five hundred fifty-one billion, one hundred sixteen million, six hundred thirty thousand, six hundred fifty-one".