77702397696 has 648 divisors, whose sum is σ = 291349225440. Its totient is φ = 19472302080.

The previous prime is 77702397679. The next prime is 77702397719. The reversal of 77702397696 is 69679320777.

It is a super-2 number, since 2×77702397696² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 56592466 + ... + 56593838.

Almost surely, 2^77702397696 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 77702397696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145674612720).

77702397696 is an abundant number, since it is smaller than the sum of its proper divisors (213646827744).

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

77702397696 is a wasteful number, since it uses less digits than its factorization.

77702397696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453 (or 1425 counting only the distinct ones).

The product of its (nonzero) digits is 42007896, while the sum is 63.

The spelling of 77702397696 in words is "seventy-seven billion, seven hundred two million, three hundred ninety-seven thousand, six hundred ninety-six".