1171485257800 has 96 divisors (see below), whose sum is σ = 3199875194880. Its totient is φ = 393225811200.

The previous prime is 1171485257791. The next prime is 1171485257801. The reversal of 1171485257800 is 87525841711.

It is not an unprimeable number, because it can be changed into a prime (1171485257801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20451912 + ... + 20509111.

It is an arithmetic number, because the mean of its divisors is an integer number (33332033280).

Almost surely, 2^{1171485257800} is an apocalyptic number.

1171485257800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171485257800 is an abundant number, since it is smaller than the sum of its proper divisors (2028389937080).

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

1171485257800 is a wasteful number, since it uses less digits than its factorization.

1171485257800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40961063 (or 40961054 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 49.

The spelling of 1171485257800 in words is "one trillion, one hundred seventy-one billion, four hundred eighty-five million, two hundred fifty-seven thousand, eight hundred".