64555545 has 16 divisors (see below), whose sum is σ = 109365120. Its totient is φ = 32404224.

The previous prime is 64555541. The next prime is 64555583. The reversal of 64555545 is 54555546.

It is a happy number.

It is not a de Polignac number, because 64555545 - 2² = 64555541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64555541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126325 + ... + 126834.

It is an arithmetic number, because the mean of its divisors is an integer number (6835320).

Almost surely, 2^64555545 is an apocalyptic number.

It is an amenable number.

64555545 is a deficient number, since it is larger than the sum of its proper divisors (44809575).

64555545 is a wasteful number, since it uses less digits than its factorization.

64555545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253184.

The product of its digits is 300000, while the sum is 39.

The square root of 64555545 is about 8034.6465385853. The cubic root of 64555545 is about 401.1540526209.

Subtracting from 64555545 its reverse (54555546), we obtain a palindrome (9999999).

The spelling of 64555545 in words is "sixty-four million, five hundred fifty-five thousand, five hundred forty-five".