77785801112 has 8 divisors (see below), whose sum is σ = 145848377100. Its totient is φ = 38892900552.

The previous prime is 77785801109. The next prime is 77785801123. The reversal of 77785801112 is 21110858777.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4861612562 + ... + 4861612577.

Almost surely, 2^77785801112 is an apocalyptic number.

It is an amenable number.

77785801112 is a deficient number, since it is larger than the sum of its proper divisors (68062575988).

77785801112 is a wasteful number, since it uses less digits than its factorization.

77785801112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723225145 (or 9723225141 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 47.

The spelling of 77785801112 in words is "seventy-seven billion, seven hundred eighty-five million, eight hundred one thousand, one hundred twelve".