74371645 has 4 divisors (see below), whose sum is σ = 89245980. Its totient is φ = 59497312.

The previous prime is 74371621. The next prime is 74371657. The reversal of 74371645 is 54617347.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28281124 + 46090521 = 5318^2 + 6789^2 .

It is a cyclic number.

It is not a de Polignac number, because 74371645 - 2¹¹ = 74369597 is a prime.

It is a super-2 number, since 2×74371645² = 11062283160012050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7437160 + ... + 7437169.

It is an arithmetic number, because the mean of its divisors is an integer number (22311495).

Almost surely, 2^74371645 is an apocalyptic number.

It is an amenable number.

74371645 is a deficient number, since it is larger than the sum of its proper divisors (14874335).

74371645 is a wasteful number, since it uses less digits than its factorization.

74371645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14874334.

The product of its digits is 70560, while the sum is 37.

The square root of 74371645 is about 8623.8996399541. The cubic root of 74371645 is about 420.5353057272.

The spelling of 74371645 in words is "seventy-four million, three hundred seventy-one thousand, six hundred forty-five".