74781699121 has 8 divisors (see below), whose sum is σ = 77749013664. Its totient is φ = 71868830880.

The previous prime is 74781699077. The next prime is 74781699133. The reversal of 74781699121 is 12199618747.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 74781699121 - 2⁹ = 74781698609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74781699151) 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, 13608775 + ... + 13614268.

It is an arithmetic number, because the mean of its divisors is an integer number (9718626708).

Almost surely, 2^74781699121 is an apocalyptic number.

It is an amenable number.

74781699121 is a deficient number, since it is larger than the sum of its proper divisors (2967314543).

74781699121 is a wasteful number, since it uses less digits than its factorization.

74781699121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27223151.

The product of its digits is 1524096, while the sum is 55.

The spelling of 74781699121 in words is "seventy-four billion, seven hundred eighty-one million, six hundred ninety-nine thousand, one hundred twenty-one".