63565690 has 8 divisors (see below), whose sum is σ = 114418260. Its totient is φ = 25426272.

The previous prime is 63565687. The next prime is 63565693. The reversal of 63565690 is 9656536.

It is an interprime number because it is at equal distance from previous prime (63565687) and next prime (63565693).

It can be written as a sum of positive squares in 2 ways, for example, as 63154809 + 410881 = 7947^2 + 641^2 .

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

It is a super-2 number, since 2×63565690² = 8081193890352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63565693) 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, 3178275 + ... + 3178294.

Almost surely, 2^63565690 is an apocalyptic number.

63565690 is a deficient number, since it is larger than the sum of its proper divisors (50852570).

63565690 is a wasteful number, since it uses less digits than its factorization.

63565690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6356576.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 63565690 is about 7972.8094170123. The cubic root of 63565690 is about 399.0931330345.

The spelling of 63565690 in words is "sixty-three million, five hundred sixty-five thousand, six hundred ninety".