63645630157 has 2 divisors, whose sum is σ = 63645630158. Its totient is φ = 63645630156.

The previous prime is 63645630127. The next prime is 63645630161. The reversal of 63645630157 is 75103654636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53666818921 + 9978811236 = 231661^2 + 99894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63645630157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63645630127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31822815078 + 31822815079.

It is an arithmetic number, because the mean of its divisors is an integer number (31822815079).

Almost surely, 2^63645630157 is an apocalyptic number.

It is an amenable number.

63645630157 is a deficient number, since it is larger than the sum of its proper divisors (1).

63645630157 is an equidigital number, since it uses as much as digits as its factorization.

63645630157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 63645630157 in words is "sixty-three billion, six hundred forty-five million, six hundred thirty thousand, one hundred fifty-seven".