1549113601 has 4 divisors (see below), whose sum is σ = 1770415552. Its totient is φ = 1327811652.

The previous prime is 1549113581. The next prime is 1549113613. The reversal of 1549113601 is 1063119451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1063119451 = 5519 ⋅192629.

It is a cyclic number.

It is not a de Polignac number, because 1549113601 - 2⁵ = 1549113569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1549113001) 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 in 3 ways as a sum of consecutive naturals, for example, 110650965 + ... + 110650978.

It is an arithmetic number, because the mean of its divisors is an integer number (442603888).

Almost surely, 2^1549113601 is an apocalyptic number.

It is an amenable number.

1549113601 is a deficient number, since it is larger than the sum of its proper divisors (221301951).

1549113601 is an equidigital number, since it uses as much as digits as its factorization.

1549113601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221301950.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 1549113601 is about 39358.7804816155. The cubic root of 1549113601 is about 1157.0738777317.

It can be divided in two parts, 15491 and 13601, that added together give a palindrome (29092).

The spelling of 1549113601 in words is "one billion, five hundred forty-nine million, one hundred thirteen thousand, six hundred one".