64692563 has 4 divisors (see below), whose sum is σ = 69668928. Its totient is φ = 59716200.

The previous prime is 64692559. The next prime is 64692571. The reversal of 64692563 is 36529646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36529646 = 2 ⋅18264823.

It is a cyclic number.

It is not a de Polignac number, because 64692563 - 2² = 64692559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64692563.

It is not an unprimeable number, because it can be changed into a prime (64692553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2488163 + ... + 2488188.

It is an arithmetic number, because the mean of its divisors is an integer number (17417232).

Almost surely, 2^64692563 is an apocalyptic number.

64692563 is a deficient number, since it is larger than the sum of its proper divisors (4976365).

64692563 is a wasteful number, since it uses less digits than its factorization.

64692563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976364.

The product of its digits is 233280, while the sum is 41.

The square root of 64692563 is about 8043.1687163704. The cubic root of 64692563 is about 401.4376661826.

The spelling of 64692563 in words is "sixty-four million, six hundred ninety-two thousand, five hundred sixty-three".