6511264551 has 96 divisors (see below), whose sum is σ = 10961203968. Its totient is φ = 3688312320.

The previous prime is 6511264549. The next prime is 6511264553. The reversal of 6511264551 is 1554621156.

6511264551 is a `hidden beast` number, since 6 + 5 + 1 + 1 + 2 + 645 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (6511264549) and next prime (6511264553).

It is not a de Polignac number, because 6511264551 - 2¹ = 6511264549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6511264553) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10552795 + ... + 10553411.

It is an arithmetic number, because the mean of its divisors is an integer number (114179208).

Almost surely, 2^6511264551 is an apocalyptic number.

6511264551 is a deficient number, since it is larger than the sum of its proper divisors (4449939417).

6511264551 is a wasteful number, since it uses less digits than its factorization.

6511264551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 778 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 6511264551 is about 80692.4070219745. The cubic root of 6511264551 is about 1867.3330347548. Note that the first 3 decimals are identical.

The spelling of 6511264551 in words is "six billion, five hundred eleven million, two hundred sixty-four thousand, five hundred fifty-one".