63618220531 has 2 divisors, whose sum is σ = 63618220532. Its totient is φ = 63618220530.

The previous prime is 63618220517. The next prime is 63618220541. The reversal of 63618220531 is 13502281636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63618220531 is a prime.

It is a super-2 number, since 2×63618220531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63618220541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31809110265 + 31809110266.

It is an arithmetic number, because the mean of its divisors is an integer number (31809110266).

Almost surely, 2^63618220531 is an apocalyptic number.

63618220531 is a deficient number, since it is larger than the sum of its proper divisors (1).

63618220531 is an equidigital number, since it uses as much as digits as its factorization.

63618220531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 63618220531 in words is "sixty-three billion, six hundred eighteen million, two hundred twenty thousand, five hundred thirty-one".