54135649 has 4 divisors (see below), whose sum is σ = 54268420. Its totient is φ = 54002880.

The previous prime is 54135647. The next prime is 54135661. The reversal of 54135649 is 94653145.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47541025 + 6594624 = 6895^2 + 2568^2 .

It is a cyclic number.

It is not a de Polignac number, because 54135649 - 2¹ = 54135647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54135643) 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, 65772 + ... + 66589.

It is an arithmetic number, because the mean of its divisors is an integer number (13567105).

Almost surely, 2^54135649 is an apocalyptic number.

It is an amenable number.

54135649 is a deficient number, since it is larger than the sum of its proper divisors (132771).

54135649 is a wasteful number, since it uses less digits than its factorization.

54135649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132770.

The product of its digits is 64800, while the sum is 37.

The square root of 54135649 is about 7357.6931846877. The cubic root of 54135649 is about 378.2925448253.

The spelling of 54135649 in words is "fifty-four million, one hundred thirty-five thousand, six hundred forty-nine".