74913678321 has 4 divisors (see below), whose sum is σ = 99884904432. Its totient is φ = 49942452212.

The previous prime is 74913678317. The next prime is 74913678331. The reversal of 74913678321 is 12387631947.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74913678321 - 2² = 74913678317 is a prime.

It is a super-2 number, since 2×74913678321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74913678331) 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, 12485613051 + ... + 12485613056.

It is an arithmetic number, because the mean of its divisors is an integer number (24971226108).

Almost surely, 2^74913678321 is an apocalyptic number.

It is an amenable number.

74913678321 is a deficient number, since it is larger than the sum of its proper divisors (24971226111).

74913678321 is a wasteful number, since it uses less digits than its factorization.

74913678321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24971226110.

The product of its digits is 1524096, while the sum is 51.

The spelling of 74913678321 in words is "seventy-four billion, nine hundred thirteen million, six hundred seventy-eight thousand, three hundred twenty-one".