76807561551 has 8 divisors (see below), whose sum is σ = 117040093824. Its totient is φ = 43890035160.

The previous prime is 76807561547. The next prime is 76807561553. The reversal of 76807561551 is 15516570867.

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

It is not a de Polignac number, because 76807561551 - 2² = 76807561547 is a prime.

It is a super-2 number, since 2×76807561551² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 76807561494 and 76807561503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76807561553) 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, 1828751445 + ... + 1828751486.

It is an arithmetic number, because the mean of its divisors is an integer number (14630011728).

Almost surely, 2^76807561551 is an apocalyptic number.

76807561551 is a deficient number, since it is larger than the sum of its proper divisors (40232532273).

76807561551 is a wasteful number, since it uses less digits than its factorization.

76807561551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657502941.

The product of its (nonzero) digits is 1764000, while the sum is 51.

The spelling of 76807561551 in words is "seventy-six billion, eight hundred seven million, five hundred sixty-one thousand, five hundred fifty-one".