77761383211788 has 48 divisors (see below), whose sum is σ = 186348079173984. Its totient is φ = 25219775347200.

The previous prime is 77761383211783. The next prime is 77761383211789. The reversal of 77761383211788 is 88711238316777.

It is a super-2 number, since 2×77761383211788² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77761383211783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118610488 + ... + 119264288.

It is an arithmetic number, because the mean of its divisors is an integer number (3882251649458).

Almost surely, 2^{77761383211788} is an apocalyptic number.

It is an amenable number.

77761383211788 is an abundant number, since it is smaller than the sum of its proper divisors (108586695962196).

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

77761383211788 is a wasteful number, since it uses less digits than its factorization.

77761383211788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921722 (or 921720 counting only the distinct ones).

The product of its digits is 132765696, while the sum is 69.

The spelling of 77761383211788 in words is "seventy-seven trillion, seven hundred sixty-one billion, three hundred eighty-three million, two hundred eleven thousand, seven hundred eighty-eight".