51045163615 has 4 divisors (see below), whose sum is σ = 61254196344. Its totient is φ = 40836130888.

The previous prime is 51045163607. The next prime is 51045163661. The reversal of 51045163615 is 51636154015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51045163615 - 2³ = 51045163607 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 3 ways as a sum of consecutive naturals, for example, 5104516357 + ... + 5104516366.

It is an arithmetic number, because the mean of its divisors is an integer number (15313549086).

Almost surely, 2^51045163615 is an apocalyptic number.

51045163615 is a deficient number, since it is larger than the sum of its proper divisors (10209032729).

51045163615 is a wasteful number, since it uses less digits than its factorization.

51045163615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10209032728.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 51045163615 in words is "fifty-one billion, forty-five million, one hundred sixty-three thousand, six hundred fifteen".