63642511 has 2 divisors, whose sum is σ = 63642512. Its totient is φ = 63642510.

The previous prime is 63642499. The next prime is 63642517. The reversal of 63642511 is 11524636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63642511 - 2²¹ = 61545359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63642511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63642517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31821255 + 31821256.

It is an arithmetic number, because the mean of its divisors is an integer number (31821256).

Almost surely, 2^63642511 is an apocalyptic number.

63642511 is a deficient number, since it is larger than the sum of its proper divisors (1).

63642511 is an equidigital number, since it uses as much as digits as its factorization.

63642511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 63642511 is about 7977.6256492769. The cubic root of 63642511 is about 399.2538402295.

The spelling of 63642511 in words is "sixty-three million, six hundred forty-two thousand, five hundred eleven".