77761789504 has 252 divisors, whose sum is σ = 192013027200. Its totient is φ = 31147855872.

The previous prime is 77761789499. The next prime is 77761789561. The reversal of 77761789504 is 40598716777.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 216606477 + ... + 216606835.

Almost surely, 2^77761789504 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 77761789504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96006513600).

77761789504 is an abundant number, since it is smaller than the sum of its proper divisors (114251237696).

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

77761789504 is a wasteful number, since it uses less digits than its factorization.

77761789504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 20744640, while the sum is 61.

The spelling of 77761789504 in words is "seventy-seven billion, seven hundred sixty-one million, seven hundred eighty-nine thousand, five hundred four".