77774454968 has 16 divisors (see below), whose sum is σ = 166659546480. Its totient is φ = 33331909248.

The previous prime is 77774454949. The next prime is 77774455019. The reversal of 77774454968 is 86945447777.

It is a junction number, because it is equal to n+sod(n) for n = 77774454898 and 77774454907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694414721 + ... + 694414832.

It is an arithmetic number, because the mean of its divisors is an integer number (10416221655).

Almost surely, 2^77774454968 is an apocalyptic number.

It is an amenable number.

77774454968 is an abundant number, since it is smaller than the sum of its proper divisors (88885091512).

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

77774454968 is a wasteful number, since it uses less digits than its factorization.

77774454968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388829566 (or 1388829562 counting only the distinct ones).

The product of its digits is 331914240, while the sum is 68.

The spelling of 77774454968 in words is "seventy-seven billion, seven hundred seventy-four million, four hundred fifty-four thousand, nine hundred sixty-eight".