51437540619 has 8 divisors (see below), whose sum is σ = 76203763920. Its totient is φ = 34291693728.

The previous prime is 51437540617. The next prime is 51437540647. The reversal of 51437540619 is 91604573415.

51437540619 is a `hidden beast` number, since 5 + 1 + 43 + 7 + 540 + 61 + 9 = 666.

It is not a de Polignac number, because 51437540619 - 2¹ = 51437540617 is a prime.

It is a super-2 number, since 2×51437540619² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51437540617) 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, 952547022 + ... + 952547075.

It is an arithmetic number, because the mean of its divisors is an integer number (9525470490).

Almost surely, 2^51437540619 is an apocalyptic number.

51437540619 is a deficient number, since it is larger than the sum of its proper divisors (24766223301).

51437540619 is a wasteful number, since it uses less digits than its factorization.

51437540619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905094106 (or 1905094100 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 51437540619 in words is "fifty-one billion, four hundred thirty-seven million, five hundred forty thousand, six hundred nineteen".