77943924404 has 6 divisors (see below), whose sum is σ = 136401867714. Its totient is φ = 38971962200.

The previous prime is 77943924389. The next prime is 77943924413. The reversal of 77943924404 is 40442934977.

It can be written as a sum of positive squares in only one way, i.e., 51303156004 + 26640768400 = 226502^2 + 163220^2 .

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, 9742990547 + ... + 9742990554.

It is an arithmetic number, because the mean of its divisors is an integer number (22733644619).

Almost surely, 2^77943924404 is an apocalyptic number.

It is an amenable number.

77943924404 is a deficient number, since it is larger than the sum of its proper divisors (58457943310).

77943924404 is a wasteful number, since it uses less digits than its factorization.

77943924404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19485981105 (or 19485981103 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 53.

The spelling of 77943924404 in words is "seventy-seven billion, nine hundred forty-three million, nine hundred twenty-four thousand, four hundred four".