64742574 has 32 divisors (see below), whose sum is σ = 142085664. Its totient is φ = 19543680.

The previous prime is 64742551. The next prime is 64742591. The reversal of 64742574 is 47524746.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3697 + ... + 11964.

It is an arithmetic number, because the mean of its divisors is an integer number (4440177).

Almost surely, 2^64742574 is an apocalyptic number.

64742574 is an abundant number, since it is smaller than the sum of its proper divisors (77343090).

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

64742574 is a wasteful number, since it uses less digits than its factorization.

64742574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15732.

The product of its digits is 188160, while the sum is 39.

The square root of 64742574 is about 8046.2770272965. The cubic root of 64742574 is about 401.5410841905.

The spelling of 64742574 in words is "sixty-four million, seven hundred forty-two thousand, five hundred seventy-four".