77770854630 has 192 divisors, whose sum is σ = 238660426368. Its totient is φ = 17199267840.

The previous prime is 77770854617. The next prime is 77770854631. The reversal of 77770854630 is 3645807777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77770854631) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4209894 + ... + 4228326.

It is an arithmetic number, because the mean of its divisors is an integer number (1243023054).

Almost surely, 2^77770854630 is an apocalyptic number.

77770854630 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 77770854630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119330213184).

77770854630 is an abundant number, since it is smaller than the sum of its proper divisors (160889571738).

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

77770854630 is a wasteful number, since it uses less digits than its factorization.

77770854630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18671 (or 18668 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 54.

The spelling of 77770854630 in words is "seventy-seven billion, seven hundred seventy million, eight hundred fifty-four thousand, six hundred thirty".