63540799 has 24 divisors (see below), whose sum is σ = 77196240. Its totient is φ = 52101504.

The previous prime is 63540797. The next prime is 63540809. The reversal of 63540799 is 99704536.

It is not a de Polignac number, because 63540799 - 2¹ = 63540797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63540791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111387 + ... + 111955.

It is an arithmetic number, because the mean of its divisors is an integer number (3216510).

Almost surely, 2^63540799 is an apocalyptic number.

63540799 is a deficient number, since it is larger than the sum of its proper divisors (13655441).

63540799 is a wasteful number, since it uses less digits than its factorization.

63540799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 63540799 is about 7971.2482711304. The cubic root of 63540799 is about 399.0410340480.

The spelling of 63540799 in words is "sixty-three million, five hundred forty thousand, seven hundred ninety-nine".