74775857747 has 4 divisors (see below), whose sum is σ = 74778309120. Its totient is φ = 74773406376.

The previous prime is 74775857587. The next prime is 74775857749.

It is a happy number.

74775857747 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 74775857747 - 2²⁰ = 74774809171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74775857749) 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, 1179347 + ... + 1241132.

It is an arithmetic number, because the mean of its divisors is an integer number (18694577280).

Almost surely, 2^74775857747 is an apocalyptic number.

74775857747 is a deficient number, since it is larger than the sum of its proper divisors (2451373).

74775857747 is a wasteful number, since it uses less digits than its factorization.

74775857747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451372.

The product of its digits is 376476800, while the sum is 68.

The spelling of 74775857747 in words is "seventy-four billion, seven hundred seventy-five million, eight hundred fifty-seven thousand, seven hundred forty-seven".