1825154849 has 4 divisors (see below), whose sum is σ = 2085891264. Its totient is φ = 1564418436.

The previous prime is 1825154843. The next prime is 1825154879. The reversal of 1825154849 is 9484515281.

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: 9484515281 = 41 ⋅231329641.

It is a de Polignac number, because none of the positive numbers 2^k-1825154849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1825154843) 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, 130368197 + ... + 130368210.

It is an arithmetic number, because the mean of its divisors is an integer number (521472816).

Almost surely, 2^1825154849 is an apocalyptic number.

It is an amenable number.

1825154849 is a deficient number, since it is larger than the sum of its proper divisors (260736415).

1825154849 is an equidigital number, since it uses as much as digits as its factorization.

1825154849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260736414.

The product of its digits is 460800, while the sum is 47.

The square root of 1825154849 is about 42721.8310586052. The cubic root of 1825154849 is about 1222.0807564829.

The spelling of 1825154849 in words is "one billion, eight hundred twenty-five million, one hundred fifty-four thousand, eight hundred forty-nine".