64154549 has 4 divisors (see below), whose sum is σ = 67928364. Its totient is φ = 60380736.

The previous prime is 64154537. The next prime is 64154561. The reversal of 64154549 is 94545146.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (64154537) and next prime (64154561).

It can be written as a sum of positive squares in 2 ways, for example, as 45292900 + 18861649 = 6730^2 + 4343^2 .

It is not a de Polignac number, because 64154549 - 2⁴ = 64154533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64154599) 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, 1886882 + ... + 1886915.

It is an arithmetic number, because the mean of its divisors is an integer number (16982091).

Almost surely, 2^64154549 is an apocalyptic number.

It is an amenable number.

64154549 is a deficient number, since it is larger than the sum of its proper divisors (3773815).

64154549 is a wasteful number, since it uses less digits than its factorization.

64154549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773814.

The product of its digits is 86400, while the sum is 38.

The square root of 64154549 is about 8009.6534881354. The cubic root of 64154549 is about 400.3217182574.

The spelling of 64154549 in words is "sixty-four million, one hundred fifty-four thousand, five hundred forty-nine".