74649651 has 16 divisors (see below), whose sum is σ = 109328640. Its totient is φ = 45096480.

The previous prime is 74649647. The next prime is 74649667. The reversal of 74649651 is 15694647.

It is not a de Polignac number, because 74649651 - 2² = 74649647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74649671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27160 + ... + 29781.

It is an arithmetic number, because the mean of its divisors is an integer number (6833040).

Almost surely, 2^74649651 is an apocalyptic number.

74649651 is a deficient number, since it is larger than the sum of its proper divisors (34678989).

74649651 is a wasteful number, since it uses less digits than its factorization.

74649651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56986.

The product of its digits is 181440, while the sum is 42.

The square root of 74649651 is about 8640.0029513884. The cubic root of 74649651 is about 421.0586501906.

The spelling of 74649651 in words is "seventy-four million, six hundred forty-nine thousand, six hundred fifty-one".