74637673647 has 16 divisors (see below), whose sum is σ = 110916668160. Its totient is φ = 44366666112.

The previous prime is 74637673637. The next prime is 74637673661.

74637673647 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74637673647 - 2²⁴ = 74620896431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74637673637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38511763 + ... + 38513700.

It is an arithmetic number, because the mean of its divisors is an integer number (6932291760).

Almost surely, 2^74637673647 is an apocalyptic number.

74637673647 is a deficient number, since it is larger than the sum of its proper divisors (36278994513).

74637673647 is a wasteful number, since it uses less digits than its factorization.

74637673647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77025502.

The product of its digits is 74680704, while the sum is 60.

The spelling of 74637673647 in words is "seventy-four billion, six hundred thirty-seven million, six hundred seventy-three thousand, six hundred forty-seven".