64524991 has 2 divisors, whose sum is σ = 64524992. Its totient is φ = 64524990.

The previous prime is 64524949. The next prime is 64525037. The reversal of 64524991 is 19942546.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64524991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64524191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32262495 + 32262496.

It is an arithmetic number, because the mean of its divisors is an integer number (32262496).

Almost surely, 2^64524991 is an apocalyptic number.

64524991 is a deficient number, since it is larger than the sum of its proper divisors (1).

64524991 is an equidigital number, since it uses as much as digits as its factorization.

64524991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 64524991 is about 8032.7449231256. The cubic root of 64524991 is about 401.0907541847.

The spelling of 64524991 in words is "sixty-four million, five hundred twenty-four thousand, nine hundred ninety-one".