64999494 has 72 divisors (see below), whose sum is σ = 169986960. Its totient is φ = 17581536.

The previous prime is 64999481. The next prime is 64999523. The reversal of 64999494 is 49499946.

64999494 is a `hidden beast` number, since 64 + 9 + 99 + 494 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64999494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44772 + ... + 46200.

It is an arithmetic number, because the mean of its divisors is an integer number (2360930).

Almost surely, 2^64999494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64999494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84993480).

64999494 is an abundant number, since it is smaller than the sum of its proper divisors (104987466).

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

64999494 is a wasteful number, since it uses less digits than its factorization.

64999494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482 (or 1460 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 64999494 is about 8062.2263674496. The cubic root of 64999494 is about 402.0715325294.

The spelling of 64999494 in words is "sixty-four million, nine hundred ninety-nine thousand, four hundred ninety-four".