51550151665 has 8 divisors (see below), whose sum is σ = 62153359488. Its totient is φ = 41044669680.

The previous prime is 51550151567. The next prime is 51550151669. The reversal of 51550151665 is 56615105515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51550151665 - 2⁷ = 51550151537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51550151669) 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, 24430297 + ... + 24432406.

It is an arithmetic number, because the mean of its divisors is an integer number (7769169936).

Almost surely, 2^51550151665 is an apocalyptic number.

It is an amenable number.

51550151665 is a deficient number, since it is larger than the sum of its proper divisors (10603207823).

51550151665 is a wasteful number, since it uses less digits than its factorization.

51550151665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48862919.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 51550151665 in words is "fifty-one billion, five hundred fifty million, one hundred fifty-one thousand, six hundred sixty-five".