64645401 has 8 divisors (see below), whose sum is σ = 88523584. Its totient is φ = 41932080.

The previous prime is 64645307. The next prime is 64645457. The reversal of 64645401 is 10454646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-64645401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64645481) 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, 291085 + ... + 291306.

It is an arithmetic number, because the mean of its divisors is an integer number (11065448).

Almost surely, 2^64645401 is an apocalyptic number.

It is an amenable number.

64645401 is a deficient number, since it is larger than the sum of its proper divisors (23878183).

64645401 is a wasteful number, since it uses less digits than its factorization.

64645401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582431.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 64645401 is about 8040.2363771223. The cubic root of 64645401 is about 401.3400907946.

The spelling of 64645401 in words is "sixty-four million, six hundred forty-five thousand, four hundred one".