1662172318560 has 384 divisors, whose sum is σ = 5777640658944. Its totient is φ = 399118786560.

The previous prime is 1662172318523. The next prime is 1662172318613. The reversal of 1662172318560 is 658132712661.

It is a super-2 number, since 2×1662172318560² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90027730 + ... + 90046190.

It is an arithmetic number, because the mean of its divisors is an integer number (15045939216).

Almost surely, 2^{1662172318560} is an apocalyptic number.

1662172318560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662172318560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2888820329472).

1662172318560 is an abundant number, since it is smaller than the sum of its proper divisors (4115468340384).

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

1662172318560 is a wasteful number, since it uses less digits than its factorization.

1662172318560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846 (or 18838 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 1662172318560 in words is "one trillion, six hundred sixty-two billion, one hundred seventy-two million, three hundred eighteen thousand, five hundred sixty".