63495591 has 4 divisors (see below), whose sum is σ = 84660792. Its totient is φ = 42330392.

The previous prime is 63495583. The next prime is 63495599. The reversal of 63495591 is 19559436.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (63495583) and next prime (63495599).

It is a cyclic number.

It is not a de Polignac number, because 63495591 - 2³ = 63495583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63495599) 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, 10582596 + ... + 10582601.

It is an arithmetic number, because the mean of its divisors is an integer number (21165198).

Almost surely, 2^63495591 is an apocalyptic number.

63495591 is a deficient number, since it is larger than the sum of its proper divisors (21165201).

63495591 is a wasteful number, since it uses less digits than its factorization.

63495591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21165200.

The product of its digits is 145800, while the sum is 42.

The square root of 63495591 is about 7968.4120751879. The cubic root of 63495591 is about 398.9463750396.

The spelling of 63495591 in words is "sixty-three million, four hundred ninety-five thousand, five hundred ninety-one".