64420911 has 6 divisors (see below), whose sum is σ = 93052440. Its totient is φ = 42947268.

The previous prime is 64420903. The next prime is 64420913. The reversal of 64420911 is 11902446.

64420911 is a `hidden beast` number, since 644 + 2 + 0 + 9 + 11 = 666.

It is not a de Polignac number, because 64420911 - 2³ = 64420903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64420913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3578931 + ... + 3578948.

It is an arithmetic number, because the mean of its divisors is an integer number (15508740).

Almost surely, 2^64420911 is an apocalyptic number.

64420911 is a deficient number, since it is larger than the sum of its proper divisors (28631529).

64420911 is a wasteful number, since it uses less digits than its factorization.

64420911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7157885 (or 7157882 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 64420911 is about 8026.2638257162. The cubic root of 64420911 is about 400.8749825350.

The spelling of 64420911 in words is "sixty-four million, four hundred twenty thousand, nine hundred eleven".