77404407044 has 12 divisors (see below), whose sum is σ = 135474843084. Its totient is φ = 38697309024.

The previous prime is 77404407013. The next prime is 77404407049. The reversal of 77404407044 is 44070440477.

It can be written as a sum of positive squares in 2 ways, for example, as 55281414400 + 22122992644 = 235120^2 + 148738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77404406992 and 77404407010.

It is not an unprimeable number, because it can be changed into a prime (77404407049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187927 + ... + 1251390.

It is an arithmetic number, because the mean of its divisors is an integer number (11289570257).

Almost surely, 2^77404407044 is an apocalyptic number.

It is an amenable number.

77404407044 is a deficient number, since it is larger than the sum of its proper divisors (58070436040).

77404407044 is a wasteful number, since it uses less digits than its factorization.

77404407044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447254 (or 2447252 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 41.

The spelling of 77404407044 in words is "seventy-seven billion, four hundred four million, four hundred seven thousand, forty-four".