51657772943679 has 8 divisors (see below), whose sum is σ = 78716606390400. Its totient is φ = 29518727396376.

The previous prime is 51657772943677. The next prime is 51657772943681. The reversal of 51657772943679 is 97634927775615.

It is an interprime number because it is at equal distance from previous prime (51657772943677) and next prime (51657772943681).

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

It is not a de Polignac number, because 51657772943679 - 2¹ = 51657772943677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51657772943677) 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, 1229946974829 + ... + 1229946974870.

It is an arithmetic number, because the mean of its divisors is an integer number (9839575798800).

Almost surely, 2^{51657772943679} is an apocalyptic number.

51657772943679 is a deficient number, since it is larger than the sum of its proper divisors (27058833446721).

51657772943679 is a wasteful number, since it uses less digits than its factorization.

51657772943679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459893949709.

The product of its digits is 4200789600, while the sum is 78.

The spelling of 51657772943679 in words is "fifty-one trillion, six hundred fifty-seven billion, seven hundred seventy-two million, nine hundred forty-three thousand, six hundred seventy-nine".