51881779936807 has 8 divisors (see below), whose sum is σ = 51888976336080. Its totient is φ = 51874583887680.

The previous prime is 51881779936769. The next prime is 51881779936823. The reversal of 51881779936807 is 70863997718815.

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

It is a cyclic number.

It is not a de Polignac number, because 51881779936807 - 2²³ = 51881771548199 is a prime.

It is a super-2 number, since 2×51881779936807² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51881779936837) 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, 440891544 + ... + 441009202.

It is an arithmetic number, because the mean of its divisors is an integer number (6486122042010).

Almost surely, 2^{51881779936807} is an apocalyptic number.

51881779936807 is a deficient number, since it is larger than the sum of its proper divisors (7196399273).

51881779936807 is a wasteful number, since it uses less digits than its factorization.

51881779936807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175073.

The product of its (nonzero) digits is 1280240640, while the sum is 79.

The spelling of 51881779936807 in words is "fifty-one trillion, eight hundred eighty-one billion, seven hundred seventy-nine million, nine hundred thirty-six thousand, eight hundred seven".