1549449451 has 4 divisors (see below), whose sum is σ = 1690308504. Its totient is φ = 1408590400.

The previous prime is 1549449431. The next prime is 1549449463.

1549449451 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1549449451 - 2¹³ = 1549441259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1549449431) 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, 70429510 + ... + 70429531.

It is an arithmetic number, because the mean of its divisors is an integer number (422577126).

Almost surely, 2^1549449451 is an apocalyptic number.

1549449451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1549449451 is a deficient number, since it is larger than the sum of its proper divisors (140859053).

1549449451 is a wasteful number, since it uses less digits than its factorization.

1549449451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140859052.

The product of its digits is 518400, while the sum is 46.

The square root of 1549449451 is about 39363.0467697814. The cubic root of 1549449451 is about 1157.1574901024.

The spelling of 1549449451 in words is "one billion, five hundred forty-nine million, four hundred forty-nine thousand, four hundred fifty-one".