449121615 has 16 divisors (see below), whose sum is σ = 722322528. Its totient is φ = 238288896.

The previous prime is 449121599. The next prime is 449121619. The reversal of 449121615 is 516121944.

It is not a de Polignac number, because 449121615 - 2⁴ = 449121599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449121619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74674 + ... + 80463.

It is an arithmetic number, because the mean of its divisors is an integer number (45145158).

Almost surely, 2^449121615 is an apocalyptic number.

449121615 is a deficient number, since it is larger than the sum of its proper divisors (273200913).

449121615 is a wasteful number, since it uses less digits than its factorization.

449121615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155338.

The product of its digits is 8640, while the sum is 33.

The square root of 449121615 is about 21192.4895894749. The cubic root of 449121615 is about 765.8105041327.

It can be divided in two parts, 4491 and 21615, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 449121615 in words is "four hundred forty-nine million, one hundred twenty-one thousand, six hundred fifteen".