77307051888 has 480 divisors, whose sum is σ = 253189128192. Its totient is φ = 22632825600.

The previous prime is 77307051839. The next prime is 77307051911. The reversal of 77307051888 is 88815070377.

It is a super-2 number, since 2×77307051888² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 233555883 + ... + 233556213.

Almost surely, 2^77307051888 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 77307051888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126594564096).

77307051888 is an abundant number, since it is smaller than the sum of its proper divisors (175882076304).

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

77307051888 is a wasteful number, since it uses less digits than its factorization.

77307051888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 54.

The spelling of 77307051888 in words is "seventy-seven billion, three hundred seven million, fifty-one thousand, eight hundred eighty-eight".