64261573 has 2 divisors, whose sum is σ = 64261574. Its totient is φ = 64261572.

The previous prime is 64261541. The next prime is 64261577. The reversal of 64261573 is 37516246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 613089 = 7978^2 + 783^2 .

It is a cyclic number.

It is not a de Polignac number, because 64261573 - 2⁵ = 64261541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64261577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32130786 + 32130787.

It is an arithmetic number, because the mean of its divisors is an integer number (32130787).

Almost surely, 2^64261573 is an apocalyptic number.

It is an amenable number.

64261573 is a deficient number, since it is larger than the sum of its proper divisors (1).

64261573 is an equidigital number, since it uses as much as digits as its factorization.

64261573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 64261573 is about 8016.3316423412. The cubic root of 64261573 is about 400.5442030219.

The spelling of 64261573 in words is "sixty-four million, two hundred sixty-one thousand, five hundred seventy-three".