63618453959 has 4 divisors (see below), whose sum is σ = 63690666480. Its totient is φ = 63546241440.

The previous prime is 63618453937. The next prime is 63618453967. The reversal of 63618453959 is 95935481636.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 63618453959 - 2¹² = 63618449863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63618453898 and 63618453907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63618453919) 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, 36104939 + ... + 36106700.

It is an arithmetic number, because the mean of its divisors is an integer number (15922666620).

Almost surely, 2^63618453959 is an apocalyptic number.

63618453959 is a deficient number, since it is larger than the sum of its proper divisors (72212521).

63618453959 is an equidigital number, since it uses as much as digits as its factorization.

63618453959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72212520.

The product of its digits is 20995200, while the sum is 59.

The spelling of 63618453959 in words is "sixty-three billion, six hundred eighteen million, four hundred fifty-three thousand, nine hundred fifty-nine".