64989651 has 8 divisors (see below), whose sum is σ = 90420480. Its totient is φ = 41442632.

The previous prime is 64989643. The next prime is 64989653. The reversal of 64989651 is 15698946.

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

It is a cyclic number.

It is not a de Polignac number, because 64989651 - 2³ = 64989643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64989651.

It is not an unprimeable number, because it can be changed into a prime (64989653) 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, 470871 + ... + 471008.

It is an arithmetic number, because the mean of its divisors is an integer number (11302560).

Almost surely, 2^64989651 is an apocalyptic number.

64989651 is a deficient number, since it is larger than the sum of its proper divisors (25430829).

64989651 is a wasteful number, since it uses less digits than its factorization.

64989651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941905.

The product of its digits is 466560, while the sum is 48.

The square root of 64989651 is about 8061.6159050156. The cubic root of 64989651 is about 402.0512360131.

The spelling of 64989651 in words is "sixty-four million, nine hundred eighty-nine thousand, six hundred fifty-one".