64990345 has 16 divisors (see below), whose sum is σ = 89837568. Its totient is φ = 44210880.

The previous prime is 64990333. The next prime is 64990351. The reversal of 64990345 is 54309946.

It is not a de Polignac number, because 64990345 - 2⁵ = 64990313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64990298 and 64990307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2866 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (5614848).

Almost surely, 2^64990345 is an apocalyptic number.

It is an amenable number.

64990345 is a deficient number, since it is larger than the sum of its proper divisors (24847223).

64990345 is a wasteful number, since it uses less digits than its factorization.

64990345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14760.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 64990345 is about 8061.6589483803. The cubic root of 64990345 is about 402.0526671259.

The spelling of 64990345 in words is "sixty-four million, nine hundred ninety thousand, three hundred forty-five".