64896557 has 16 divisors (see below), whose sum is σ = 73084032. Its totient is φ = 57107520.

The previous prime is 64896551. The next prime is 64896617. The reversal of 64896557 is 75569846.

It is a cyclic number.

It is not a de Polignac number, because 64896557 - 2¹⁸ = 64634413 is a prime.

It is a super-2 number, since 2×64896557² = 8423126220908498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64896551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128768 + ... + 129270.

It is an arithmetic number, because the mean of its divisors is an integer number (4567752).

Almost surely, 2^64896557 is an apocalyptic number.

It is an amenable number.

64896557 is a deficient number, since it is larger than the sum of its proper divisors (8187475).

64896557 is a wasteful number, since it uses less digits than its factorization.

64896557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its digits is 1814400, while the sum is 50.

The square root of 64896557 is about 8055.8399313790. The cubic root of 64896557 is about 401.8591723903.

Subtracting 64896557 from its reverse (75569846), we obtain a square (10673289 = 3267²).

The spelling of 64896557 in words is "sixty-four million, eight hundred ninety-six thousand, five hundred fifty-seven".