77908025807520 has 192 divisors, whose sum is σ = 248815411044480. Its totient is φ = 20487307788288.

The previous prime is 77908025807503. The next prime is 77908025807527. The reversal of 77908025807520 is 2570852080977.

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

It is not an unprimeable number, because it can be changed into a prime (77908025807527) 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, 203987296 + ... + 204368864.

It is an arithmetic number, because the mean of its divisors is an integer number (1295913599190).

Almost surely, 2^{77908025807520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77908025807520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124407705522240).

77908025807520 is an abundant number, since it is smaller than the sum of its proper divisors (170907385236960).

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

77908025807520 is a wasteful number, since it uses less digits than its factorization.

77908025807520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387487 (or 387479 counting only the distinct ones).

The product of its (nonzero) digits is 19756800, while the sum is 60.

The spelling of 77908025807520 in words is "seventy-seven trillion, nine hundred eight billion, twenty-five million, eight hundred seven thousand, five hundred twenty".