74896378191 has 32 divisors (see below), whose sum is σ = 114542968320. Its totient is φ = 48338059392.

The previous prime is 74896378153. The next prime is 74896378273. The reversal of 74896378191 is 19187369847.

74896378191 is a `hidden beast` number, since 7 + 489 + 63 + 7 + 8 + 1 + 91 = 666.

It is not a de Polignac number, because 74896378191 - 2¹⁰ = 74896377167 is a prime.

It is a super-2 number, since 2×74896378191² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74896378691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154251 + ... + 416636.

It is an arithmetic number, because the mean of its divisors is an integer number (3579467760).

Almost surely, 2^74896378191 is an apocalyptic number.

74896378191 is a deficient number, since it is larger than the sum of its proper divisors (39646590129).

74896378191 is a wasteful number, since it uses less digits than its factorization.

74896378191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571052 (or 571046 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 74896378191 in words is "seventy-four billion, eight hundred ninety-six million, three hundred seventy-eight thousand, one hundred ninety-one".