64621617 has 8 divisors (see below), whose sum is σ = 88263840. Its totient is φ = 42030240.

The previous prime is 64621589. The next prime is 64621633. The reversal of 64621617 is 71612646.

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

It is not a de Polignac number, because 64621617 - 2⁶ = 64621553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64621637) 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, 262567 + ... + 262812.

It is an arithmetic number, because the mean of its divisors is an integer number (11032980).

Almost surely, 2^64621617 is an apocalyptic number.

It is an amenable number.

64621617 is a deficient number, since it is larger than the sum of its proper divisors (23642223).

64621617 is a wasteful number, since it uses less digits than its factorization.

64621617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525423.

The product of its digits is 12096, while the sum is 33.

The square root of 64621617 is about 8038.7571800621. The cubic root of 64621617 is about 401.2908651036.

The spelling of 64621617 in words is "sixty-four million, six hundred twenty-one thousand, six hundred seventeen".