64109090 has 8 divisors (see below), whose sum is σ = 115396380. Its totient is φ = 25643632.

The previous prime is 64109083. The next prime is 64109093. The reversal of 64109090 is 9090146.

It can be written as a sum of positive squares in 2 ways, for example, as 63856081 + 253009 = 7991^2 + 503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

64109090 is a modest number, since divided by 9090 gives 6410 as remainder.

It is not an unprimeable number, because it can be changed into a prime (64109093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3205445 + ... + 3205464.

Almost surely, 2^64109090 is an apocalyptic number.

64109090 is a deficient number, since it is larger than the sum of its proper divisors (51287290).

64109090 is a wasteful number, since it uses less digits than its factorization.

64109090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410916.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 64109090 is about 8006.8152220468. The cubic root of 64109090 is about 400.2271418254.

The spelling of 64109090 in words is "sixty-four million, one hundred nine thousand, ninety".