1172972691660 has 768 divisors, whose sum is σ = 4289067417600. Its totient is φ = 232497807360.

The previous prime is 1172972691629. The next prime is 1172972691679. The reversal of 1172972691660 is 661962792711.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1172972691660.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2612411116 + ... + 2612411564.

It is an arithmetic number, because the mean of its divisors is an integer number (5584723200).

Almost surely, 2^{1172972691660} is an apocalyptic number.

1172972691660 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 1172972691660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2144533708800).

1172972691660 is an abundant number, since it is smaller than the sum of its proper divisors (3116094725940).

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

1172972691660 is a wasteful number, since it uses less digits than its factorization.

1172972691660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 57.

The spelling of 1172972691660 in words is "one trillion, one hundred seventy-two billion, nine hundred seventy-two million, six hundred ninety-one thousand, six hundred sixty".