51051440005 has 16 divisors (see below), whose sum is σ = 64615320000. Its totient is φ = 38614043520.

The previous prime is 51051439987. The next prime is 51051440039. The reversal of 51051440005 is 50004415015.

It is a happy number.

It is not a de Polignac number, because 51051440005 - 2⁵ = 51051439973 is a prime.

It is a super-2 number, since 2×51051440005² (a number of 22 digits) contains 22 as substring.

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, 491056 + ... + 585865.

It is an arithmetic number, because the mean of its divisors is an integer number (4038457500).

Almost surely, 2^51051440005 is an apocalyptic number.

It is an amenable number.

51051440005 is a deficient number, since it is larger than the sum of its proper divisors (13563879995).

51051440005 is a wasteful number, since it uses less digits than its factorization.

51051440005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077444.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 51051440005 in words is "fifty-one billion, fifty-one million, four hundred forty thousand, five".