77908923976620 has 384 divisors, whose sum is σ = 258699003494400. Its totient is φ = 17307938995200.

The previous prime is 77908923976577. The next prime is 77908923976621. The reversal of 77908923976620 is 2667932980977.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (77908923976621) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 882006897 + ... + 882095223.

It is an arithmetic number, because the mean of its divisors is an integer number (673695321600).

Almost surely, 2^{77908923976620} 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 77908923976620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129349501747200).

77908923976620 is an abundant number, since it is smaller than the sum of its proper divisors (180790079517780).

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

77908923976620 is a wasteful number, since it uses less digits than its factorization.

77908923976620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90669 (or 90667 counting only the distinct ones).

The product of its (nonzero) digits is 864162432, while the sum is 75.

The spelling of 77908923976620 in words is "seventy-seven trillion, nine hundred eight billion, nine hundred twenty-three million, nine hundred seventy-six thousand, six hundred twenty".