74989718897 has 4 divisors (see below), whose sum is σ = 75018376356. Its totient is φ = 74961061440.

The previous prime is 74989718873. The next prime is 74989718977. The reversal of 74989718897 is 79881798947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79881798947 = 1153 ⋅69281699.

It can be written as a sum of positive squares in 2 ways, for example, as 49504470016 + 25485248881 = 222496^2 + 159641^2 .

It is a cyclic number.

It is not a de Polignac number, because 74989718897 - 2¹⁸ = 74989456753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74989718597) 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, 14324804 + ... + 14330037.

It is an arithmetic number, because the mean of its divisors is an integer number (18754594089).

Almost surely, 2^74989718897 is an apocalyptic number.

It is an amenable number.

74989718897 is a deficient number, since it is larger than the sum of its proper divisors (28657459).

74989718897 is a wasteful number, since it uses less digits than its factorization.

74989718897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28657458.

The product of its digits is 512096256, while the sum is 77.

The spelling of 74989718897 in words is "seventy-four billion, nine hundred eighty-nine million, seven hundred eighteen thousand, eight hundred ninety-seven".