77280012744 has 64 divisors (see below), whose sum is σ = 214740383040. Its totient is φ = 22976328960.

The previous prime is 77280012737. The next prime is 77280012763. The reversal of 77280012744 is 44721008277.

It is a junction number, because it is equal to n+sod(n) for n = 77280012696 and 77280012705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2747587 + ... + 2775570.

It is an arithmetic number, because the mean of its divisors is an integer number (3355318485).

Almost surely, 2^77280012744 is an apocalyptic number.

It is an amenable number.

77280012744 is an abundant number, since it is smaller than the sum of its proper divisors (137460370296).

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

77280012744 is a wasteful number, since it uses less digits than its factorization.

77280012744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5523230 (or 5523226 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 42.

The spelling of 77280012744 in words is "seventy-seven billion, two hundred eighty million, twelve thousand, seven hundred forty-four".