1173973155840 has 360 divisors, whose sum is σ = 4210058820240. Its totient is φ = 302258847744.

The previous prime is 1173973155833. The next prime is 1173973155863. The reversal of 1173973155840 is 485513793711.

1173973155840 is a `hidden beast` number, since 1 + 17 + 3 + 9 + 7 + 31 + 558 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×1173973155840² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21353667 + ... + 21408573.

It is an arithmetic number, because the mean of its divisors is an integer number (11694607834).

Almost surely, 2^{1173973155840} is an apocalyptic number.

1173973155840 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 1173973155840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105029410120).

1173973155840 is an abundant number, since it is smaller than the sum of its proper divisors (3036085664400).

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

1173973155840 is an equidigital number, since it uses as much as digits as its factorization.

1173973155840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54975 (or 54946 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The spelling of 1173973155840 in words is "one trillion, one hundred seventy-three billion, nine hundred seventy-three million, one hundred fifty-five thousand, eight hundred forty".