2551511551555 has 8 divisors (see below), whose sum is σ = 3103756517952. Its totient is φ = 2013247470528.

The previous prime is 2551511551553. The next prime is 2551511551571. The reversal of 2551511551555 is 5551551151552.

It is a happy number.

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 2551511551555 - 2¹ = 2551511551553 is a prime.

It is a super-2 number, since 2×2551511551555² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551511551553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3495220939 + ... + 3495221668.

It is an arithmetic number, because the mean of its divisors is an integer number (387969564744).

Almost surely, 2^{2551511551555} is an apocalyptic number.

2551511551555 is a deficient number, since it is larger than the sum of its proper divisors (552244966397).

2551511551555 is an equidigital number, since it uses as much as digits as its factorization.

2551511551555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990442685.

The product of its digits is 781250, while the sum is 46.

The spelling of 2551511551555 in words is "two trillion, five hundred fifty-one billion, five hundred eleven million, five hundred fifty-one thousand, five hundred fifty-five".