77143790444 has 24 divisors (see below), whose sum is σ = 155234139648. Its totient is φ = 32858790480.

The previous prime is 77143790431. The next prime is 77143790491. The reversal of 77143790444 is 44409734177.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77143790392 and 77143790401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8446772 + ... + 8455899.

It is an arithmetic number, because the mean of its divisors is an integer number (6468089152).

Almost surely, 2^77143790444 is an apocalyptic number.

It is an amenable number.

77143790444 is an abundant number, since it is smaller than the sum of its proper divisors (78090349204).

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

77143790444 is a wasteful number, since it uses less digits than its factorization.

77143790444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16902845 (or 16902843 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 77143790444 in words is "seventy-seven billion, one hundred forty-three million, seven hundred ninety thousand, four hundred forty-four".