64512723 has 24 divisors (see below), whose sum is σ = 98671104. Its totient is φ = 37393840.

The previous prime is 64512709. The next prime is 64512727. The reversal of 64512723 is 32721546.

It is not a de Polignac number, because 64512723 - 2¹² = 64508627 is a prime.

It is a super-4 number, since 4×64512723⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (64512727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4486 + ... + 12212.

It is an arithmetic number, because the mean of its divisors is an integer number (4111296).

Almost surely, 2^64512723 is an apocalyptic number.

64512723 is a deficient number, since it is larger than the sum of its proper divisors (34158381).

64512723 is a wasteful number, since it uses less digits than its factorization.

64512723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7775 (or 7764 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 64512723 is about 8031.9812624283. The cubic root of 64512723 is about 401.0653330614.

The spelling of 64512723 in words is "sixty-four million, five hundred twelve thousand, seven hundred twenty-three".