77880753780 has 96 divisors (see below), whose sum is σ = 230590983168. Its totient is φ = 19608038400.

The previous prime is 77880753751. The next prime is 77880753781. The reversal of 77880753780 is 8735708877.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77880753781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434367 + ... + 586886.

It is an arithmetic number, because the mean of its divisors is an integer number (2401989408).

Almost surely, 2^77880753780 is an apocalyptic number.

It is an amenable number.

77880753780 is an abundant number, since it is smaller than the sum of its proper divisors (152710229388).

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

77880753780 is a wasteful number, since it uses less digits than its factorization.

77880753780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021337 (or 1021335 counting only the distinct ones).

The product of its (nonzero) digits is 18439680, while the sum is 60.

The spelling of 77880753780 in words is "seventy-seven billion, eight hundred eighty million, seven hundred fifty-three thousand, seven hundred eighty".