51554515415 has 16 divisors (see below), whose sum is σ = 66635938656. Its totient is φ = 38064374400.

The previous prime is 51554515409. The next prime is 51554515427. The reversal of 51554515415 is 51451545515.

51554515415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51554515415 - 2⁶ = 51554515351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322460 + ... + 455070.

It is an arithmetic number, because the mean of its divisors is an integer number (4164746166).

Almost surely, 2^51554515415 is an apocalyptic number.

51554515415 is a deficient number, since it is larger than the sum of its proper divisors (15081423241).

51554515415 is a wasteful number, since it uses less digits than its factorization.

51554515415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138610.

The product of its digits is 250000, while the sum is 41.

The spelling of 51554515415 in words is "fifty-one billion, five hundred fifty-four million, five hundred fifteen thousand, four hundred fifteen".