63618420615 has 32 divisors (see below), whose sum is σ = 102909216960. Its totient is φ = 33557704704.

The previous prime is 63618420611. The next prime is 63618420683. The reversal of 63618420615 is 51602481636.

It is not a de Polignac number, because 63618420615 - 2² = 63618420611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63618420611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 875767 + ... + 945623.

It is an arithmetic number, because the mean of its divisors is an integer number (3215913030).

Almost surely, 2^63618420615 is an apocalyptic number.

63618420615 is a deficient number, since it is larger than the sum of its proper divisors (39290796345).

63618420615 is a wasteful number, since it uses less digits than its factorization.

63618420615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70531.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 63618420615 in words is "sixty-three billion, six hundred eighteen million, four hundred twenty thousand, six hundred fifteen".