64545461 has 4 divisors (see below), whose sum is σ = 65454624. Its totient is φ = 63636300.

The previous prime is 64545443. The next prime is 64545473. The reversal of 64545461 is 16454546.

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: 16454546 = 2 ⋅8227273.

It is a cyclic number.

It is not a de Polignac number, because 64545461 - 2²² = 60351157 is a prime.

It is a super-2 number, since 2×64545461² = 8332233071405042, which contains 22 as substring.

It is a deceptive number, since it divides R_64545460.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64545491) 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, 454475 + ... + 454616.

It is an arithmetic number, because the mean of its divisors is an integer number (16363656).

Almost surely, 2^64545461 is an apocalyptic number.

It is an amenable number.

64545461 is a deficient number, since it is larger than the sum of its proper divisors (909163).

64545461 is an equidigital number, since it uses as much as digits as its factorization.

64545461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909162.

The product of its digits is 57600, while the sum is 35.

The square root of 64545461 is about 8034.0189818048. The cubic root of 64545461 is about 401.1331639009.

The spelling of 64545461 in words is "sixty-four million, five hundred forty-five thousand, four hundred sixty-one".