674512564 has 36 divisors (see below), whose sum is σ = 1299716964. Its totient is φ = 306064000.

The previous prime is 674512561. The next prime is 674512583. The reversal of 674512564 is 465215476.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 353816100 + 320696464 = 18810^2 + 17908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674512561) 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, 454704 + ... + 456184.

It is an arithmetic number, because the mean of its divisors is an integer number (36103249).

Almost surely, 2^674512564 is an apocalyptic number.

It is an amenable number.

674512564 is a deficient number, since it is larger than the sum of its proper divisors (625204400).

674512564 is a wasteful number, since it uses less digits than its factorization.

674512564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448 (or 2435 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 674512564 is about 25971.3797092107. The cubic root of 674512564 is about 876.9941192826.

The spelling of 674512564 in words is "six hundred seventy-four million, five hundred twelve thousand, five hundred sixty-four".