74451575551 has 4 divisors (see below), whose sum is σ = 74453011704. Its totient is φ = 74450139400.

The previous prime is 74451575521. The next prime is 74451575579. The reversal of 74451575551 is 15557515447.

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 74451575551 - 2¹¹ = 74451573503 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74451575495 and 74451575504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74451575501) 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, 637285 + ... + 745006.

It is an arithmetic number, because the mean of its divisors is an integer number (18613252926).

Almost surely, 2^74451575551 is an apocalyptic number.

74451575551 is a deficient number, since it is larger than the sum of its proper divisors (1436153).

74451575551 is a wasteful number, since it uses less digits than its factorization.

74451575551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436152.

The product of its digits is 2450000, while the sum is 49.

The spelling of 74451575551 in words is "seventy-four billion, four hundred fifty-one million, five hundred seventy-five thousand, five hundred fifty-one".