77790896064 has 168 divisors, whose sum is σ = 263047569408. Its totient is φ = 21508968960.

The previous prime is 77790896063. The next prime is 77790896093. The reversal of 77790896064 is 46069809777.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 77790895992 and 77790896010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77790896063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186192 + ... + 436175.

Almost surely, 2^77790896064 is an apocalyptic number.

It is an amenable number.

77790896064 is an abundant number, since it is smaller than the sum of its proper divisors (185256673344).

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

77790896064 is a wasteful number, since it uses less digits than its factorization.

77790896064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622423 (or 622410 counting only the distinct ones).

The product of its (nonzero) digits is 32006016, while the sum is 63.

The spelling of 77790896064 in words is "seventy-seven billion, seven hundred ninety million, eight hundred ninety-six thousand, sixty-four".