1661872230768 has 40 divisors (see below), whose sum is σ = 4441210275600. Its totient is φ = 534855430144.

The previous prime is 1661872230719. The next prime is 1661872230773. The reversal of 1661872230768 is 8670322781661.

It is a super-2 number, since 2×1661872230768² (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, 596935473 + ... + 596938256.

It is an arithmetic number, because the mean of its divisors is an integer number (111030256890).

Almost surely, 2^{1661872230768} is an apocalyptic number.

It is an amenable number.

1661872230768 is an abundant number, since it is smaller than the sum of its proper divisors (2779338044832).

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

1661872230768 is a wasteful number, since it uses less digits than its factorization.

1661872230768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193873769 (or 1193873763 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

It can be divided in two parts, 166187 and 2230768, that added together give a triangular number (2396955 = T₂₁₈₉).

The spelling of 1661872230768 in words is "one trillion, six hundred sixty-one billion, eight hundred seventy-two million, two hundred thirty thousand, seven hundred sixty-eight".