64196091 has 32 divisors (see below), whose sum is σ = 98003520. Its totient is φ = 41513472.

The previous prime is 64196051. The next prime is 64196123. The reversal of 64196091 is 19069146.

64196091 is a `hidden beast` number, since 6 + 41 + 9 + 609 + 1 = 666.

It is not a de Polignac number, because 64196091 - 2¹¹ = 64194043 is a prime.

It is a super-2 number, since 2×64196091² = 8242276199360562, which contains 22 as substring.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (64196051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161505 + ... + 161901.

It is an arithmetic number, because the mean of its divisors is an integer number (3062610).

Almost surely, 2^64196091 is an apocalyptic number.

64196091 is a deficient number, since it is larger than the sum of its proper divisors (33807429).

64196091 is a wasteful number, since it uses less digits than its factorization.

64196091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 64196091 is about 8012.2463142367. The cubic root of 64196091 is about 400.4081063980.

The spelling of 64196091 in words is "sixty-four million, one hundred ninety-six thousand, ninety-one".