74157608181 has 4 divisors (see below), whose sum is σ = 98876810912. Its totient is φ = 49438405452.

The previous prime is 74157608153. The next prime is 74157608201. The reversal of 74157608181 is 18180675147.

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 not a de Polignac number, because 74157608181 - 2²⁵ = 74124053749 is a prime.

It is a super-2 number, since 2×74157608181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74157608181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74157608141) 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, 12359601361 + ... + 12359601366.

It is an arithmetic number, because the mean of its divisors is an integer number (24719202728).

Almost surely, 2^74157608181 is an apocalyptic number.

It is an amenable number.

74157608181 is a deficient number, since it is larger than the sum of its proper divisors (24719202731).

74157608181 is a wasteful number, since it uses less digits than its factorization.

74157608181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24719202730.

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 74157608181 in words is "seventy-four billion, one hundred fifty-seven million, six hundred eight thousand, one hundred eighty-one".