64241557 has 2 divisors, whose sum is σ = 64241558. Its totient is φ = 64241556.

The previous prime is 64241549. The next prime is 64241561. The reversal of 64241557 is 75514246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33339076 + 30902481 = 5774^2 + 5559^2 .

It is a cyclic number.

It is not a de Polignac number, because 64241557 - 2³ = 64241549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64241587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32120778 + 32120779.

It is an arithmetic number, because the mean of its divisors is an integer number (32120779).

Almost surely, 2^64241557 is an apocalyptic number.

It is an amenable number.

64241557 is a deficient number, since it is larger than the sum of its proper divisors (1).

64241557 is an equidigital number, since it uses as much as digits as its factorization.

64241557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 64241557 is about 8015.0830937676. The cubic root of 64241557 is about 400.5026119386.

The spelling of 64241557 in words is "sixty-four million, two hundred forty-one thousand, five hundred fifty-seven".