74657641947 has 8 divisors (see below), whose sum is σ = 113764025856. Its totient is φ = 42661509672.

The previous prime is 74657641939. The next prime is 74657641973. The reversal of 74657641947 is 74914675647.

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

It is not a de Polignac number, because 74657641947 - 2³ = 74657641939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74657641907) 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, 1777562883 + ... + 1777562924.

It is an arithmetic number, because the mean of its divisors is an integer number (14220503232).

Almost surely, 2^74657641947 is an apocalyptic number.

74657641947 is a deficient number, since it is larger than the sum of its proper divisors (39106383909).

74657641947 is a wasteful number, since it uses less digits than its factorization.

74657641947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555125817.

The product of its digits is 35562240, while the sum is 60.

The spelling of 74657641947 in words is "seventy-four billion, six hundred fifty-seven million, six hundred forty-one thousand, nine hundred forty-seven".