64622340157 has 2 divisors, whose sum is σ = 64622340158. Its totient is φ = 64622340156.

The previous prime is 64622340131. The next prime is 64622340179. The reversal of 64622340157 is 75104322646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60243738916 + 4378601241 = 245446^2 + 66171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64622340157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64622340197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311170078 + 32311170079.

It is an arithmetic number, because the mean of its divisors is an integer number (32311170079).

Almost surely, 2^64622340157 is an apocalyptic number.

It is an amenable number.

64622340157 is a deficient number, since it is larger than the sum of its proper divisors (1).

64622340157 is an equidigital number, since it uses as much as digits as its factorization.

64622340157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 64622340157 in words is "sixty-four billion, six hundred twenty-two million, three hundred forty thousand, one hundred fifty-seven".