64272061 has 4 divisors (see below), whose sum is σ = 73453792. Its totient is φ = 55090332.

The previous prime is 64272059. The next prime is 64272107. The reversal of 64272061 is 16027246.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16027246 = 2 ⋅8013623.

It is a cyclic number.

It is not a de Polignac number, because 64272061 - 2¹ = 64272059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64272161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4590855 + ... + 4590868.

It is an arithmetic number, because the mean of its divisors is an integer number (18363448).

Almost surely, 2^64272061 is an apocalyptic number.

It is an amenable number.

64272061 is a deficient number, since it is larger than the sum of its proper divisors (9181731).

64272061 is an equidigital number, since it uses as much as digits as its factorization.

64272061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9181730.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 64272061 is about 8016.9857802044. The cubic root of 64272061 is about 400.5659925035.

The spelling of 64272061 in words is "sixty-four million, two hundred seventy-two thousand, sixty-one".