74278159641 has 36 divisors (see below), whose sum is σ = 124827380964. Its totient is φ = 42437908800.

The previous prime is 74278159609. The next prime is 74278159691. The reversal of 74278159641 is 14695187247.

74278159641 is a `hidden beast` number, since 7 + 4 + 2 + 7 + 8 + 1 + 596 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61155311616 + 13122848025 = 247296^2 + 114555^2 .

It is not a de Polignac number, because 74278159641 - 2⁵ = 74278159609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74278159691) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4428531 + ... + 4445271.

It is an arithmetic number, because the mean of its divisors is an integer number (3467427249).

Almost surely, 2^74278159641 is an apocalyptic number.

It is an amenable number.

74278159641 is a deficient number, since it is larger than the sum of its proper divisors (50549221323).

74278159641 is a wasteful number, since it uses less digits than its factorization.

74278159641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26822 (or 26812 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 74278159641 in words is "seventy-four billion, two hundred seventy-eight million, one hundred fifty-nine thousand, six hundred forty-one".