76807561552 has 40 divisors (see below), whose sum is σ = 159014097000. Its totient is φ = 35813117952.

The previous prime is 76807561547. The next prime is 76807561553. The reversal of 76807561552 is 25516570867.

It can be written as a sum of positive squares in 4 ways, for example, as 42776166976 + 34031394576 = 206824^2 + 184476^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 76807561552.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265677 + ... + 1324972.

It is an arithmetic number, because the mean of its divisors is an integer number (3975352425).

Almost surely, 2^76807561552 is an apocalyptic number.

It is an amenable number.

76807561552 is an abundant number, since it is smaller than the sum of its proper divisors (82206535448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

76807561552 is a wasteful number, since it uses less digits than its factorization.

76807561552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590783 (or 2590777 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 76807561552 in words is "seventy-six billion, eight hundred seven million, five hundred sixty-one thousand, five hundred fifty-two".