77777312350 has 24 divisors (see below), whose sum is σ = 144950064120. Its totient is φ = 31049793120.

The previous prime is 77777312309. The next prime is 77777312359. The reversal of 77777312350 is 5321377777.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77777312294 and 77777312303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77777312359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1502592 + ... + 1553491.

It is an arithmetic number, because the mean of its divisors is an integer number (6039586005).

Almost surely, 2^77777312350 is an apocalyptic number.

77777312350 is a deficient number, since it is larger than the sum of its proper divisors (67172751770).

77777312350 is a wasteful number, since it uses less digits than its factorization.

77777312350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056604 (or 3056599 counting only the distinct ones).

The product of its (nonzero) digits is 1512630, while the sum is 49.

The spelling of 77777312350 in words is "seventy-seven billion, seven hundred seventy-seven million, three hundred twelve thousand, three hundred fifty".