51984694599 has 16 divisors (see below), whose sum is σ = 72336249600. Its totient is φ = 33145206336.

The previous prime is 51984694549. The next prime is 51984694609. The reversal of 51984694599 is 99549648915.

It is not a de Polignac number, because 51984694599 - 2¹⁹ = 51984170311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51984694549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511572 + ... + 604710.

It is an arithmetic number, because the mean of its divisors is an integer number (4521015600).

Almost surely, 2^51984694599 is an apocalyptic number.

51984694599 is a deficient number, since it is larger than the sum of its proper divisors (20351555001).

51984694599 is a wasteful number, since it uses less digits than its factorization.

51984694599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101254.

The product of its digits is 125971200, while the sum is 69.

The spelling of 51984694599 in words is "fifty-one billion, nine hundred eighty-four million, six hundred ninety-four thousand, five hundred ninety-nine".