64481090 has 16 divisors (see below), whose sum is σ = 117194688. Its totient is φ = 25541616.

The previous prime is 64481083. The next prime is 64481093. The reversal of 64481090 is 9018446.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64481093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30272 + ... + 32331.

It is an arithmetic number, because the mean of its divisors is an integer number (7324668).

Almost surely, 2^64481090 is an apocalyptic number.

64481090 is a deficient number, since it is larger than the sum of its proper divisors (52713598).

64481090 is a wasteful number, since it uses less digits than its factorization.

64481090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62713.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 64481090 is about 8030.0118306264. The cubic root of 64481090 is about 400.9997699018. Note that the first 3 decimals are identical.

The spelling of 64481090 in words is "sixty-four million, four hundred eighty-one thousand, ninety".