64091016 has 48 divisors (see below), whose sum is σ = 189362160. Its totient is φ = 19421280.

The previous prime is 64090991. The next prime is 64091017. The reversal of 64091016 is 61019046.

64091016 is a `hidden beast` number, since 640 + 9 + 1 + 0 + 16 = 666.

It is not an unprimeable number, because it can be changed into a prime (64091017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39670 + ... + 41253.

It is an arithmetic number, because the mean of its divisors is an integer number (3945045).

Almost surely, 2^64091016 is an apocalyptic number.

64091016 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64091016 is an abundant number, since it is smaller than the sum of its proper divisors (125271144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64091016 is a wasteful number, since it uses less digits than its factorization.

64091016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80946 (or 80939 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 64091016 is about 8005.6864789973. The cubic root of 64091016 is about 400.1895268514.

The spelling of 64091016 in words is "sixty-four million, ninety-one thousand, sixteen".