64749572 has 24 divisors (see below), whose sum is σ = 116335296. Its totient is φ = 31516128.

The previous prime is 64749571. The next prime is 64749649. The reversal of 64749572 is 27594746.

It is not an unprimeable number, because it can be changed into a prime (64749571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83378 + ... + 84150.

It is an arithmetic number, because the mean of its divisors is an integer number (4847304).

Almost surely, 2^64749572 is an apocalyptic number.

It is an amenable number.

64749572 is a deficient number, since it is larger than the sum of its proper divisors (51585724).

64749572 is a wasteful number, since it uses less digits than its factorization.

64749572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1305 counting only the distinct ones).

The product of its digits is 423360, while the sum is 44.

The square root of 64749572 is about 8046.7118750456. The cubic root of 64749572 is about 401.5555511432. Note that the first 5 decimals are identical.

The spelling of 64749572 in words is "sixty-four million, seven hundred forty-nine thousand, five hundred seventy-two".