74639547922 has 4 divisors (see below), whose sum is σ = 111959321886. Its totient is φ = 37319773960.

The previous prime is 74639547919. The next prime is 74639547929. The reversal of 74639547922 is 22974593647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22974593647 = 53 ⋅433482899.

It can be written as a sum of positive squares in only one way, i.e., 60053913481 + 14585634441 = 245059^2 + 120771^2 .

It is a super-2 number, since 2×74639547922² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (74639547929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18659886979 + ... + 18659886982.

Almost surely, 2^74639547922 is an apocalyptic number.

74639547922 is a deficient number, since it is larger than the sum of its proper divisors (37319773964).

74639547922 is a wasteful number, since it uses less digits than its factorization.

74639547922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37319773963.

The product of its digits is 22861440, while the sum is 58.

The spelling of 74639547922 in words is "seventy-four billion, six hundred thirty-nine million, five hundred forty-seven thousand, nine hundred twenty-two".