1161285087890 has 16 divisors (see below), whose sum is σ = 2106772319232. Its totient is φ = 460856443824.

The previous prime is 1161285087827. The next prime is 1161285087901. The reversal of 1161285087890 is 987805821611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457197584 + ... + 457200123.

It is an arithmetic number, because the mean of its divisors is an integer number (131673269952).

Almost surely, 2^{1161285087890} is an apocalyptic number.

1161285087890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161285087890 is a deficient number, since it is larger than the sum of its proper divisors (945487231342).

1161285087890 is a wasteful number, since it uses less digits than its factorization.

1161285087890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914397841.

The product of its (nonzero) digits is 1935360, while the sum is 56.

The spelling of 1161285087890 in words is "one trillion, one hundred sixty-one billion, two hundred eighty-five million, eighty-seven thousand, eight hundred ninety".