74977254949 has 4 divisors (see below), whose sum is σ = 74979877420. Its totient is φ = 74974632480.

The previous prime is 74977254941. The next prime is 74977255009. The reversal of 74977254949 is 94945277947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61380062500 + 13597192449 = 247750^2 + 116607^2 .

It is a cyclic number.

It is not a de Polignac number, because 74977254949 - 2³ = 74977254941 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 (74977254941) 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, 1267872 + ... + 1325689.

It is an arithmetic number, because the mean of its divisors is an integer number (18744969355).

Almost surely, 2^74977254949 is an apocalyptic number.

It is an amenable number.

74977254949 is a deficient number, since it is larger than the sum of its proper divisors (2622471).

74977254949 is a wasteful number, since it uses less digits than its factorization.

74977254949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622470.

The product of its digits is 160030080, while the sum is 67.

The spelling of 74977254949 in words is "seventy-four billion, nine hundred seventy-seven million, two hundred fifty-four thousand, nine hundred forty-nine".