51000000005 has 8 divisors (see below), whose sum is σ = 61206465024. Its totient is φ = 40795690000.

The previous prime is 50999999957. The next prime is 51000000041. The reversal of 51000000005 is 50000000015.

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

It is not a de Polignac number, because 51000000005 - 2¹⁴ = 50999983621 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 7 ways as a sum of consecutive naturals, for example, 486221 + ... + 581730.

It is an arithmetic number, because the mean of its divisors is an integer number (7650808128).

Almost surely, 2^51000000005 is an apocalyptic number.

It is an amenable number.

51000000005 is a deficient number, since it is larger than the sum of its proper divisors (10206465019).

51000000005 is a wasteful number, since it uses less digits than its factorization.

51000000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077507.

The product of its (nonzero) digits is 25, while the sum is 11.

The spelling of 51000000005 in words is "fifty-one billion, five", and thus it is an aban number and an uban number.