1617349640 has 16 divisors (see below), whose sum is σ = 3639036780. Its totient is φ = 646939840.

The previous prime is 1617349589. The next prime is 1617349681. The reversal of 1617349640 is 469437161.

It can be written as a sum of positive squares in 2 ways, for example, as 1587384964 + 29964676 = 39842^2 + 5474^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20216831 + ... + 20216910.

Almost surely, 2^1617349640 is an apocalyptic number.

1617349640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1617349640 is an abundant number, since it is smaller than the sum of its proper divisors (2021687140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1617349640 is a wasteful number, since it uses less digits than its factorization.

1617349640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40433752 (or 40433748 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1617349640 is about 40216.2857558974. The cubic root of 1617349640 is about 1173.8194607390.

The spelling of 1617349640 in words is "one billion, six hundred seventeen million, three hundred forty-nine thousand, six hundred forty".