1172666142720 has 416 divisors, whose sum is σ = 4184361210240. Its totient is φ = 311556833280.

The previous prime is 1172666142719. The next prime is 1172666142731. The reversal of 1172666142720 is 272416662711.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155377987 + ... + 155385533.

Almost surely, 2^{1172666142720} is an apocalyptic number.

1172666142720 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 1172666142720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092180605120).

1172666142720 is an abundant number, since it is smaller than the sum of its proper divisors (3011695067520).

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

1172666142720 is an equidigital number, since it uses as much as digits as its factorization.

1172666142720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7866 (or 7838 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 1172666142720 in words is "one trillion, one hundred seventy-two billion, six hundred sixty-six million, one hundred forty-two thousand, seven hundred twenty".