74877742648 has 16 divisors (see below), whose sum is σ = 140702986080. Its totient is φ = 37356946368.

The previous prime is 74877742631. The next prime is 74877742661. The reversal of 74877742648 is 84624777847.

It is a self number, because there is not a number n which added to its sum of digits gives 74877742648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10236736 + ... + 10244047.

It is an arithmetic number, because the mean of its divisors is an integer number (8793936630).

Almost surely, 2^74877742648 is an apocalyptic number.

It is an amenable number.

74877742648 is a deficient number, since it is larger than the sum of its proper divisors (65825243432).

74877742648 is a wasteful number, since it uses less digits than its factorization.

74877742648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20481246 (or 20481242 counting only the distinct ones).

The product of its digits is 118013952, while the sum is 64.

The spelling of 74877742648 in words is "seventy-four billion, eight hundred seventy-seven million, seven hundred forty-two thousand, six hundred forty-eight".