74897757793 has 18 divisors (see below), whose sum is σ = 77794910802. Its totient is φ = 72105340320.

The previous prime is 74897757743. The next prime is 74897757797. The reversal of 74897757793 is 39775779847.

It can be written as a sum of positive squares in only one way, i.e., 40440003409 + 34457754384 = 201097^2 + 185628^2 .

It is a de Polignac number, because none of the positive numbers 2^k-74897757793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74897757797) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 150095458 + ... + 150095956.

It is an arithmetic number, because the mean of its divisors is an integer number (4321939489).

Almost surely, 2^74897757793 is an apocalyptic number.

It is an amenable number.

74897757793 is a deficient number, since it is larger than the sum of its proper divisors (2897153009).

74897757793 is an frugal number, since it uses more digits than its factorization.

74897757793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 843 counting only the distinct ones).

The product of its digits is 653456160, while the sum is 73.

The spelling of 74897757793 in words is "seventy-four billion, eight hundred ninety-seven million, seven hundred fifty-seven thousand, seven hundred ninety-three".