51615375454 has 16 divisors (see below), whose sum is σ = 78207228000. Its totient is φ = 25547616864.

The previous prime is 51615375451. The next prime is 51615375479. The reversal of 51615375454 is 45457351615.

It is a super-2 number, since 2×51615375454² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615375451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250749 + ... + 407560.

It is an arithmetic number, because the mean of its divisors is an integer number (4887951750).

Almost surely, 2^51615375454 is an apocalyptic number.

51615375454 is a deficient number, since it is larger than the sum of its proper divisors (26591852546).

51615375454 is a wasteful number, since it uses less digits than its factorization.

51615375454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658707.

The product of its digits is 1260000, while the sum is 46.

The spelling of 51615375454 in words is "fifty-one billion, six hundred fifteen million, three hundred seventy-five thousand, four hundred fifty-four".