51166787927499 has 8 divisors (see below), whose sum is σ = 75802648781520. Its totient is φ = 34111191951648.

The previous prime is 51166787927473. The next prime is 51166787927527. The reversal of 51166787927499 is 99472978766115.

51166787927499 is a `hidden beast` number, since 5 + 116 + 6 + 7 + 8 + 7 + 9 + 2 + 7 + 499 = 666.

It is not a de Polignac number, because 51166787927499 - 2¹⁷ = 51166787796427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51166787927419) 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, 947533109742 + ... + 947533109795.

It is an arithmetic number, because the mean of its divisors is an integer number (9475331097690).

Almost surely, 2^{51166787927499} is an apocalyptic number.

51166787927499 is a deficient number, since it is larger than the sum of its proper divisors (24635860854021).

51166787927499 is a wasteful number, since it uses less digits than its factorization.

51166787927499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895066219546 (or 1895066219540 counting only the distinct ones).

The product of its digits is 2880541440, while the sum is 81.

The spelling of 51166787927499 in words is "fifty-one trillion, one hundred sixty-six billion, seven hundred eighty-seven million, nine hundred twenty-seven thousand, four hundred ninety-nine".