51653791575 has 144 divisors (see below), whose sum is σ = 99672745536. Its totient is φ = 25506201600.

The previous prime is 51653791543. The next prime is 51653791591. The reversal of 51653791575 is 57519735615.

It is a happy number.

51653791575 is a `hidden beast` number, since 5 + 1 + 65 + 3 + 7 + 9 + 1 + 575 = 666.

It is not a de Polignac number, because 51653791575 - 2⁵ = 51653791543 is a prime.

It is a super-2 number, since 2×51653791575² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 29067087 + ... + 29068863.

It is an arithmetic number, because the mean of its divisors is an integer number (692171844).

Almost surely, 2^51653791575 is an apocalyptic number.

51653791575 is a deficient number, since it is larger than the sum of its proper divisors (48018953961).

51653791575 is a wasteful number, since it uses less digits than its factorization.

51653791575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1986 counting only the distinct ones).

The product of its digits is 4961250, while the sum is 54.

The spelling of 51653791575 in words is "fifty-one billion, six hundred fifty-three million, seven hundred ninety-one thousand, five hundred seventy-five".