6511556100051 has 12 divisors (see below), whose sum is σ = 9406423897000. Its totient is φ = 4340648386080.

The previous prime is 6511556100043. The next prime is 6511556100059. The reversal of 6511556100051 is 1500016551156.

It is a happy number.

6511556100051 is a `hidden beast` number, since 6 + 51 + 1 + 556 + 1 + 0 + 0 + 0 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (6511556100043) and next prime (6511556100059).

It is not a de Polignac number, because 6511556100051 - 2³ = 6511556100043 is a prime.

It is a super-2 number, since 2×6511556100051² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6511556099979 and 6511556100015.

It is not an unprimeable number, because it can be changed into a prime (6511556100059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32311801 + ... + 32512698.

Almost surely, 2^{6511556100051} is an apocalyptic number.

6511556100051 is a deficient number, since it is larger than the sum of its proper divisors (2894867796949).

6511556100051 is a wasteful number, since it uses less digits than its factorization.

6511556100051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64835666 (or 64835663 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 6511556100051 in words is "six trillion, five hundred eleven billion, five hundred fifty-six million, one hundred thousand, fifty-one".