64145849 has 2 divisors, whose sum is σ = 64145850. Its totient is φ = 64145848.

The previous prime is 64145839. The next prime is 64145863. The reversal of 64145849 is 94854146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61340224 + 2805625 = 7832^2 + 1675^2 .

It is a cyclic number.

It is not a de Polignac number, because 64145849 - 2⁴ = 64145833 is a prime.

It is a super-2 number, since 2×64145849² = 8229379887861602, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64145819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32072924 + 32072925.

It is an arithmetic number, because the mean of its divisors is an integer number (32072925).

Almost surely, 2^64145849 is an apocalyptic number.

It is an amenable number.

64145849 is a deficient number, since it is larger than the sum of its proper divisors (1).

64145849 is an equidigital number, since it uses as much as digits as its factorization.

64145849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 64145849 is about 8009.1103750666. The cubic root of 64145849 is about 400.3036215599.

The spelling of 64145849 in words is "sixty-four million, one hundred forty-five thousand, eight hundred forty-nine".