1617994225 has 12 divisors (see below), whose sum is σ = 2093544576. Its totient is φ = 1238116880.

The previous prime is 1617994219. The next prime is 1617994243. The reversal of 1617994225 is 5224997161.

It is not a de Polignac number, because 1617994225 - 2¹⁷ = 1617863153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1406377 + ... + 1407526.

It is an arithmetic number, because the mean of its divisors is an integer number (174462048).

Almost surely, 2^1617994225 is an apocalyptic number.

It is an amenable number.

1617994225 is a deficient number, since it is larger than the sum of its proper divisors (475550351).

1617994225 is a wasteful number, since it uses less digits than its factorization.

1617994225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813936 (or 2813931 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 1617994225 is about 40224.2989373339. The cubic root of 1617994225 is about 1173.9753795962.

The spelling of 1617994225 in words is "one billion, six hundred seventeen million, nine hundred ninety-four thousand, two hundred twenty-five".