74643516 has 36 divisors (see below), whose sum is σ = 188944392. Its totient is φ = 24846624.

The previous prime is 74643511. The next prime is 74643553. The reversal of 74643516 is 61534647.

It is a happy number.

74643516 is a `hidden beast` number, since 7 + 4 + 643 + 5 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74643511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50646 + ... + 52098.

Almost surely, 2^74643516 is an apocalyptic number.

It is an amenable number.

74643516 is an abundant number, since it is smaller than the sum of its proper divisors (114300876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74643516 is a wasteful number, since it uses less digits than its factorization.

74643516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890 (or 2885 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 74643516 is about 8639.6479094926. The cubic root of 74643516 is about 421.0471151262.

The spelling of 74643516 in words is "seventy-four million, six hundred forty-three thousand, five hundred sixteen".