74819451509 has 16 divisors (see below), whose sum is σ = 82019659776. Its totient is φ = 67686418800.

The previous prime is 74819451479. The next prime is 74819451517. The reversal of 74819451509 is 90515491847.

It is not a de Polignac number, because 74819451509 - 2³² = 70524484213 is a prime.

It is a Smith number, since the sum of its digits (53) 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (74819451599) 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, 1972844 + ... + 2010410.

It is an arithmetic number, because the mean of its divisors is an integer number (5126228736).

Almost surely, 2^74819451509 is an apocalyptic number.

It is an amenable number.

74819451509 is a deficient number, since it is larger than the sum of its proper divisors (7200208267).

74819451509 is a wasteful number, since it uses less digits than its factorization.

74819451509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38456.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 74819451509 in words is "seventy-four billion, eight hundred nineteen million, four hundred fifty-one thousand, five hundred nine".