1612154449 has 4 divisors (see below), whose sum is σ = 1612877364. Its totient is φ = 1611431536.

The previous prime is 1612154447. The next prime is 1612154461. The reversal of 1612154449 is 9444512161.

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 1210552849 + 401601600 = 34793^2 + 20040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612154449 - 2¹ = 1612154447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612154443) 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, 358102 + ... + 362575.

It is an arithmetic number, because the mean of its divisors is an integer number (403219341).

Almost surely, 2^1612154449 is an apocalyptic number.

It is an amenable number.

1612154449 is a deficient number, since it is larger than the sum of its proper divisors (722915).

1612154449 is an equidigital number, since it uses as much as digits as its factorization.

1612154449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722914.

The product of its digits is 34560, while the sum is 37.

The square root of 1612154449 is about 40151.6431668743. The cubic root of 1612154449 is about 1172.5612793883.

The spelling of 1612154449 in words is "one billion, six hundred twelve million, one hundred fifty-four thousand, four hundred forty-nine".