51005555556001 has 8 divisors (see below), whose sum is σ = 51263631581184. Its totient is φ = 50747863289280.

The previous prime is 51005555555789. The next prime is 51005555556103. The reversal of 51005555556001 is 10065555550015.

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

It is a cyclic number.

It is not a de Polignac number, because 51005555556001 - 2²⁵ = 51005522001569 is a prime.

It is a super-2 number, since 2×51005555556001² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51005555551001) 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, 95673121 + ... + 96204766.

It is an arithmetic number, because the mean of its divisors is an integer number (6407953947648).

Almost surely, 2^{51005555556001} is an apocalyptic number.

It is an amenable number.

51005555556001 is a deficient number, since it is larger than the sum of its proper divisors (258076025183).

51005555556001 is a wasteful number, since it uses less digits than its factorization.

51005555556001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191879231.

The product of its (nonzero) digits is 468750, while the sum is 43.

The spelling of 51005555556001 in words is "fifty-one trillion, five billion, five hundred fifty-five million, five hundred fifty-six thousand, one".