64531541 has 8 divisors (see below), whose sum is σ = 68410944. Its totient is φ = 60661440.

The previous prime is 64531531. The next prime is 64531547. The reversal of 64531541 is 14513546.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64531541 - 2⁶ = 64531477 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 (64531547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16286 + ... + 19856.

It is an arithmetic number, because the mean of its divisors is an integer number (8551368).

Almost surely, 2^64531541 is an apocalyptic number.

It is an amenable number.

64531541 is a deficient number, since it is larger than the sum of its proper divisors (3879403).

64531541 is a wasteful number, since it uses less digits than its factorization.

64531541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651.

The product of its digits is 7200, while the sum is 29.

The square root of 64531541 is about 8033.1526189909. The cubic root of 64531541 is about 401.1043254409.

The spelling of 64531541 in words is "sixty-four million, five hundred thirty-one thousand, five hundred forty-one".