64736519 has 2 divisors, whose sum is σ = 64736520. Its totient is φ = 64736518.

The previous prime is 64736489. The next prime is 64736549. The reversal of 64736519 is 91563746.

It is a balanced prime because it is at equal distance from previous prime (64736489) and next prime (64736549).

It is a cyclic number.

It is not a de Polignac number, because 64736519 - 2⁸ = 64736263 is a prime.

It is a super-2 number, since 2×64736519² = 8381633784474722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64736549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32368259 + 32368260.

It is an arithmetic number, because the mean of its divisors is an integer number (32368260).

Almost surely, 2^64736519 is an apocalyptic number.

64736519 is a deficient number, since it is larger than the sum of its proper divisors (1).

64736519 is an equidigital number, since it uses as much as digits as its factorization.

64736519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 64736519 is about 8045.9007575286. The cubic root of 64736519 is about 401.5285658587.

The spelling of 64736519 in words is "sixty-four million, seven hundred thirty-six thousand, five hundred nineteen".