76513011561 has 80 divisors (see below), whose sum is σ = 136328860800. Its totient is φ = 41839483392.

The previous prime is 76513011559. The next prime is 76513011569. The reversal of 76513011561 is 16511031567.

76513011561 is a `hidden beast` number, since 7 + 6 + 51 + 30 + 11 + 561 = 666.

It is not a de Polignac number, because 76513011561 - 2¹ = 76513011559 is a prime.

It is a super-3 number, since 3×76513011561³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (76513011569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1837470 + ... + 1878648.

It is an arithmetic number, because the mean of its divisors is an integer number (1704110760).

Almost surely, 2^76513011561 is an apocalyptic number.

It is an amenable number.

76513011561 is a deficient number, since it is larger than the sum of its proper divisors (59815849239).

76513011561 is a wasteful number, since it uses less digits than its factorization.

76513011561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41340 (or 41331 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The spelling of 76513011561 in words is "seventy-six billion, five hundred thirteen million, eleven thousand, five hundred sixty-one".