64555305 has 16 divisors (see below), whose sum is σ = 106850880. Its totient is φ = 33242048.

The previous prime is 64555303. The next prime is 64555313. The reversal of 64555305 is 50355546.

It is a cyclic number.

It is not a de Polignac number, because 64555305 - 2¹ = 64555303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64555301) 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, 73767 + ... + 74636.

It is an arithmetic number, because the mean of its divisors is an integer number (6678180).

Almost surely, 2^64555305 is an apocalyptic number.

It is an amenable number.

64555305 is a deficient number, since it is larger than the sum of its proper divisors (42295575).

64555305 is a wasteful number, since it uses less digits than its factorization.

64555305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148440.

The product of its (nonzero) digits is 45000, while the sum is 33.

The square root of 64555305 is about 8034.6316032535. The cubic root of 64555305 is about 401.1535554930.

The spelling of 64555305 in words is "sixty-four million, five hundred fifty-five thousand, three hundred five".