64812541 has 2 divisors, whose sum is σ = 64812542. Its totient is φ = 64812540.

The previous prime is 64812511. The next prime is 64812557. The reversal of 64812541 is 14521846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64336441 + 476100 = 8021^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 64812541 - 2²⁵ = 31258109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64812511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32406270 + 32406271.

It is an arithmetic number, because the mean of its divisors is an integer number (32406271).

Almost surely, 2^64812541 is an apocalyptic number.

It is an amenable number.

64812541 is a deficient number, since it is larger than the sum of its proper divisors (1).

64812541 is an equidigital number, since it uses as much as digits as its factorization.

64812541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 31.

The square root of 64812541 is about 8050.6236404393. The cubic root of 64812541 is about 401.6856799786.

The spelling of 64812541 in words is "sixty-four million, eight hundred twelve thousand, five hundred forty-one".