74865256847 has 4 divisors (see below), whose sum is σ = 74868614496. Its totient is φ = 74861899200.

The previous prime is 74865256813. The next prime is 74865256859.

74865256847 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 74865256847 - 2⁶ = 74865256783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74865256847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74865256747) 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, 1645154 + ... + 1690047.

It is an arithmetic number, because the mean of its divisors is an integer number (18717153624).

Almost surely, 2^74865256847 is an apocalyptic number.

74865256847 is a deficient number, since it is larger than the sum of its proper divisors (3357649).

74865256847 is a wasteful number, since it uses less digits than its factorization.

74865256847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357648.

The product of its digits is 90316800, while the sum is 62.

The spelling of 74865256847 in words is "seventy-four billion, eight hundred sixty-five million, two hundred fifty-six thousand, eight hundred forty-seven".