1802251568249 has 4 divisors (see below), whose sum is σ = 1966092619920. Its totient is φ = 1638410516580.

The previous prime is 1802251568203. The next prime is 1802251568291. The reversal of 1802251568249 is 9428651522081.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1802251568249 is a prime.

It is a super-2 number, since 2×1802251568249² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1802251568249.

It is not an unprimeable number, because it can be changed into a prime (1802251568149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81920525819 + ... + 81920525840.

It is an arithmetic number, because the mean of its divisors is an integer number (491523154980).

Almost surely, 2^{1802251568249} is an apocalyptic number.

It is an amenable number.

1802251568249 is a deficient number, since it is larger than the sum of its proper divisors (163841051671).

1802251568249 is a wasteful number, since it uses less digits than its factorization.

1802251568249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163841051670.

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 1802251568249 in words is "one trillion, eight hundred two billion, two hundred fifty-one million, five hundred sixty-eight thousand, two hundred forty-nine".