77773299136 has 56 divisors (see below), whose sum is σ = 166409918640. Its totient is φ = 35850688512.

The previous prime is 77773299091. The next prime is 77773299143. The reversal of 77773299136 is 63199237777.

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 7 ways as a sum of consecutive naturals, for example, 615315 + ... + 730861.

It is an arithmetic number, because the mean of its divisors is an integer number (2971605690).

Almost surely, 2^77773299136 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 77773299136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83204959320).

77773299136 is an abundant number, since it is smaller than the sum of its proper divisors (88636619504).

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

77773299136 is a wasteful number, since it uses less digits than its factorization.

77773299136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116381 (or 116371 counting only the distinct ones).

The product of its digits is 21003948, while the sum is 61.

The spelling of 77773299136 in words is "seventy-seven billion, seven hundred seventy-three million, two hundred ninety-nine thousand, one hundred thirty-six".