64724994 has 56 divisors (see below), whose sum is σ = 147318912. Its totient is φ = 21315960.

The previous prime is 64724987. The next prime is 64724999. The reversal of 64724994 is 49942746.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64724999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 149959 + ... + 150389.

Almost surely, 2^64724994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64724994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73659456).

64724994 is an abundant number, since it is smaller than the sum of its proper divisors (82593918).

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

64724994 is a wasteful number, since it uses less digits than its factorization.

64724994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 539 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 64724994 is about 8045.1845224333. The cubic root of 64724994 is about 401.5047364888.

The spelling of 64724994 in words is "sixty-four million, seven hundred twenty-four thousand, nine hundred ninety-four".