1171455385818 has 32 divisors (see below), whose sum is σ = 2470380897600. Its totient is φ = 369309424896.

The previous prime is 1171455385769. The next prime is 1171455385843. The reversal of 1171455385818 is 8185835541711.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8596753 + ... + 8731956.

It is an arithmetic number, because the mean of its divisors is an integer number (77199403050).

Almost surely, 2^{1171455385818} is an apocalyptic number.

1171455385818 is an abundant number, since it is smaller than the sum of its proper divisors (1298925511782).

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

1171455385818 is a wasteful number, since it uses less digits than its factorization.

1171455385818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17329326.

The product of its digits is 5376000, while the sum is 57.

The spelling of 1171455385818 in words is "one trillion, one hundred seventy-one billion, four hundred fifty-five million, three hundred eighty-five thousand, eight hundred eighteen".