153540638 has 4 divisors (see below), whose sum is σ = 230310960. Its totient is φ = 76770318.

The previous prime is 153540637. The next prime is 153540641. The reversal of 153540638 is 836045351.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 153540598 and 153540607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153540637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38385158 + ... + 38385161.

It is an arithmetic number, because the mean of its divisors is an integer number (57577740).

Almost surely, 2^153540638 is an apocalyptic number.

153540638 is a deficient number, since it is larger than the sum of its proper divisors (76770322).

153540638 is an equidigital number, since it uses as much as digits as its factorization.

153540638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76770321.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 153540638 is about 12391.1516010418. The cubic root of 153540638 is about 535.4773600671.

Adding to 153540638 its reverse (836045351), we get a palindrome (989585989).

The spelling of 153540638 in words is "one hundred fifty-three million, five hundred forty thousand, six hundred thirty-eight".