1617880401 has 6 divisors (see below), whose sum is σ = 2336938370. Its totient is φ = 1078586928.

The previous prime is 1617880379. The next prime is 1617880403. The reversal of 1617880401 is 1040887161.

1617880401 is a `hidden beast` number, since 1 + 6 + 178 + 80 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1427026176 + 190854225 = 37776^2 + 13815^2 .

It is not a de Polignac number, because 1617880401 - 2⁷ = 1617880273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1617880403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89882236 + ... + 89882253.

Almost surely, 2^1617880401 is an apocalyptic number.

It is an amenable number.

1617880401 is a deficient number, since it is larger than the sum of its proper divisors (719057969).

1617880401 is a wasteful number, since it uses less digits than its factorization.

1617880401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179764495 (or 179764492 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1617880401 is about 40222.8840462740. The cubic root of 1617880401 is about 1173.9478496860.

The spelling of 1617880401 in words is "one billion, six hundred seventeen million, eight hundred eighty thousand, four hundred one".