77497797630 has 32 divisors (see below), whose sum is σ = 202903325568. Its totient is φ = 18787344800.

The previous prime is 77497797623. The next prime is 77497797647. The reversal of 77497797630 is 3679779477.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117420576 + ... + 117421235.

It is an arithmetic number, because the mean of its divisors is an integer number (6340728924).

Almost surely, 2^77497797630 is an apocalyptic number.

77497797630 is an abundant number, since it is smaller than the sum of its proper divisors (125405527938).

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

77497797630 is a wasteful number, since it uses less digits than its factorization.

77497797630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234841832.

The product of its (nonzero) digits is 98018424, while the sum is 66.

The spelling of 77497797630 in words is "seventy-seven billion, four hundred ninety-seven million, seven hundred ninety-seven thousand, six hundred thirty".