64240157 has 2 divisors, whose sum is σ = 64240158. Its totient is φ = 64240156.

The previous prime is 64240147. The next prime is 64240213. The reversal of 64240157 is 75104246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52330756 + 11909401 = 7234^2 + 3451^2 .

It is a cyclic number.

It is not a de Polignac number, because 64240157 - 2²⁰ = 63191581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64240147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32120078 + 32120079.

It is an arithmetic number, because the mean of its divisors is an integer number (32120079).

Almost surely, 2^64240157 is an apocalyptic number.

It is an amenable number.

64240157 is a deficient number, since it is larger than the sum of its proper divisors (1).

64240157 is an equidigital number, since it uses as much as digits as its factorization.

64240157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 64240157 is about 8014.9957579527. The cubic root of 64240157 is about 400.4997025667.

The spelling of 64240157 in words is "sixty-four million, two hundred forty thousand, one hundred fifty-seven".