64091138 has 8 divisors (see below), whose sum is σ = 96170700. Its totient is φ = 32034240.

The previous prime is 64091119. The next prime is 64091143. The reversal of 64091138 is 83119046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63952009 + 139129 = 7997^2 + 373^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7958 + ... + 13838.

Almost surely, 2^64091138 is an apocalyptic number.

64091138 is a deficient number, since it is larger than the sum of its proper divisors (32079562).

64091138 is a wasteful number, since it uses less digits than its factorization.

64091138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11332.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 64091138 is about 8005.6940985776. The cubic root of 64091138 is about 400.1897807772.

The spelling of 64091138 in words is "sixty-four million, ninety-one thousand, one hundred thirty-eight".