1617021108668 has 24 divisors (see below), whose sum is σ = 3234084168672. Its totient is φ = 693000057024.

The previous prime is 1617021108629. The next prime is 1617021108701. The reversal of 1617021108668 is 8668011207161.

It is a happy number.

It is a super-2 number, since 2×1617021108668² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2112146 + ... + 2774022.

It is an arithmetic number, because the mean of its divisors is an integer number (134753507028).

Almost surely, 2^{1617021108668} is an apocalyptic number.

It is an amenable number.

1617021108668 is an abundant number, since it is smaller than the sum of its proper divisors (1617063060004).

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

1617021108668 is a wasteful number, since it uses less digits than its factorization.

1617021108668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749141 (or 749139 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 1617021108668 in words is "one trillion, six hundred seventeen billion, twenty-one million, one hundred eight thousand, six hundred sixty-eight".