64116881 has 4 divisors (see below), whose sum is σ = 64284672. Its totient is φ = 63949092.

The previous prime is 64116869. The next prime is 64116901. The reversal of 64116881 is 18861146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64116881 is a prime.

It is a super-2 number, since 2×64116881² = 8221948858336322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64116821) 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, 83321 + ... + 84086.

It is an arithmetic number, because the mean of its divisors is an integer number (16071168).

Almost surely, 2^64116881 is an apocalyptic number.

It is an amenable number.

64116881 is a deficient number, since it is larger than the sum of its proper divisors (167791).

64116881 is a wasteful number, since it uses less digits than its factorization.

64116881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167790.

The product of its digits is 9216, while the sum is 35.

The square root of 64116881 is about 8007.3017302959. The cubic root of 64116881 is about 400.2433540004.

The spelling of 64116881 in words is "sixty-four million, one hundred sixteen thousand, eight hundred eighty-one".