77047965456 has 160 divisors (see below), whose sum is σ = 248427813888. Its totient is φ = 19990417920.

The previous prime is 77047965451. The next prime is 77047965457. The reversal of 77047965456 is 65456974077.

It is a self number, because there is not a number n which added to its sum of digits gives 77047965456.

It is not an unprimeable number, because it can be changed into a prime (77047965451) 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, 3489106 + ... + 3511118.

Almost surely, 2^77047965456 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 77047965456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124213906944).

77047965456 is an abundant number, since it is smaller than the sum of its proper divisors (171379848432).

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

77047965456 is a wasteful number, since it uses less digits than its factorization.

77047965456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22989 (or 22983 counting only the distinct ones).

The product of its (nonzero) digits is 44452800, while the sum is 60.

The spelling of 77047965456 in words is "seventy-seven billion, forty-seven million, nine hundred sixty-five thousand, four hundred fifty-six".