77278973008020 has 192 divisors, whose sum is σ = 254404821565440. Its totient is φ = 17162229007872.

The previous prime is 77278973007919. The next prime is 77278973008031. The reversal of 77278973008020 is 2080037987277.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14559900 + ... + 19145459.

It is an arithmetic number, because the mean of its divisors is an integer number (1325025112320).

Almost surely, 2^{77278973008020} is an apocalyptic number.

77278973008020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77278973008020 is an abundant number, since it is smaller than the sum of its proper divisors (177125848557420).

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

77278973008020 is a wasteful number, since it uses less digits than its factorization.

77278973008020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33705534 (or 33705532 counting only the distinct ones).

The product of its (nonzero) digits is 16595712, while the sum is 60.

The spelling of 77278973008020 in words is "seventy-seven trillion, two hundred seventy-eight billion, nine hundred seventy-three million, eight thousand, twenty".