64540351 has 2 divisors, whose sum is σ = 64540352. Its totient is φ = 64540350.

The previous prime is 64540337. The next prime is 64540373. The reversal of 64540351 is 15304546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64540351 - 2⁵ = 64540319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64540331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32270175 + 32270176.

It is an arithmetic number, because the mean of its divisors is an integer number (32270176).

Almost surely, 2^64540351 is an apocalyptic number.

64540351 is a deficient number, since it is larger than the sum of its proper divisors (1).

64540351 is an equidigital number, since it uses as much as digits as its factorization.

64540351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 64540351 is about 8033.7009528610. The cubic root of 64540351 is about 401.1225778502.

Adding to 64540351 its reverse (15304546), we get a palindrome (79844897).

The spelling of 64540351 in words is "sixty-four million, five hundred forty thousand, three hundred fifty-one".