76551772878 has 48 divisors (see below), whose sum is σ = 190231438176. Its totient is φ = 21794088960.

The previous prime is 76551772877. The next prime is 76551772897. The reversal of 76551772878 is 87827715567.

76551772878 is a `hidden beast` number, since 7 + 6 + 551 + 7 + 7 + 2 + 8 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76551772877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1045651 + ... + 1116462.

It is an arithmetic number, because the mean of its divisors is an integer number (3963154962).

Almost surely, 2^76551772878 is an apocalyptic number.

76551772878 is an abundant number, since it is smaller than the sum of its proper divisors (113679665298).

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

76551772878 is a wasteful number, since it uses less digits than its factorization.

76551772878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162409 (or 2162406 counting only the distinct ones).

The product of its digits is 46099200, while the sum is 63.

The spelling of 76551772878 in words is "seventy-six billion, five hundred fifty-one million, seven hundred seventy-two thousand, eight hundred seventy-eight".