77405165648 has 60 divisors (see below), whose sum is σ = 154324622592. Its totient is φ = 37610352000.

The previous prime is 77405165573. The next prime is 77405165683. The reversal of 77405165648 is 84656150477.

It is a super-3 number, since 3×77405165648³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77405165648.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23808023 + ... + 23811273.

Almost surely, 2^77405165648 is an apocalyptic number.

It is an amenable number.

77405165648 is a deficient number, since it is larger than the sum of its proper divisors (76919456944).

77405165648 is a wasteful number, since it uses less digits than its factorization.

77405165648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4420 (or 4377 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 77405165648 in words is "seventy-seven billion, four hundred five million, one hundred sixty-five thousand, six hundred forty-eight".