77621076042312 has 128 divisors (see below), whose sum is σ = 221079455170560. Its totient is φ = 22480373329920.

The previous prime is 77621076042239. The next prime is 77621076042313. The reversal of 77621076042312 is 21324067012677.

It is not an unprimeable number, because it can be changed into a prime (77621076042313) 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, 2137593 + ... + 12641655.

It is an arithmetic number, because the mean of its divisors is an integer number (1727183243520).

Almost surely, 2^{77621076042312} 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 77621076042312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110539727585280).

77621076042312 is an abundant number, since it is smaller than the sum of its proper divisors (143458379128248).

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

77621076042312 is a wasteful number, since it uses less digits than its factorization.

77621076042312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505323 (or 10505319 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 48.

The spelling of 77621076042312 in words is "seventy-seven trillion, six hundred twenty-one billion, seventy-six million, forty-two thousand, three hundred twelve".