1617344340420 has 48 divisors (see below), whose sum is σ = 4531147770240. Its totient is φ = 431045765376.

The previous prime is 1617344340373. The next prime is 1617344340431. The reversal of 1617344340420 is 240434437161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7583280 + ... + 7793639.

It is an arithmetic number, because the mean of its divisors is an integer number (94398911880).

Almost surely, 2^{1617344340420} is an apocalyptic number.

1617344340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1617344340420 is an abundant number, since it is smaller than the sum of its proper divisors (2913803429820).

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

1617344340420 is a wasteful number, since it uses less digits than its factorization.

1617344340420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15378684 (or 15378682 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 39.

Adding to 1617344340420 its reverse (240434437161), we get a palindrome (1857778777581).

The spelling of 1617344340420 in words is "one trillion, six hundred seventeen billion, three hundred forty-four million, three hundred forty thousand, four hundred twenty".