74721299451 has 8 divisors (see below), whose sum is σ = 99663979344. Its totient is φ = 49796409600.

The previous prime is 74721299441. The next prime is 74721299459. The reversal of 74721299451 is 15499212747.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74721299451 - 2¹⁰ = 74721298427 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 74721299394 and 74721299403.

It is not an unprimeable number, because it can be changed into a prime (74721299459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4437706 + ... + 4454511.

It is an arithmetic number, because the mean of its divisors is an integer number (12457997418).

Almost surely, 2^74721299451 is an apocalyptic number.

74721299451 is a deficient number, since it is larger than the sum of its proper divisors (24942679893).

74721299451 is a wasteful number, since it uses less digits than its factorization.

74721299451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8895021.

The product of its digits is 1270080, while the sum is 51.

The spelling of 74721299451 in words is "seventy-four billion, seven hundred twenty-one million, two hundred ninety-nine thousand, four hundred fifty-one".