1191856861614 has 16 divisors (see below), whose sum is σ = 2509172340480. Its totient is φ = 376375851000.

The previous prime is 1191856861597. The next prime is 1191856861667. The reversal of 1191856861614 is 4161686581911.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5227442262 + ... + 5227442489.

It is an arithmetic number, because the mean of its divisors is an integer number (156823271280).

Almost surely, 2^{1191856861614} is an apocalyptic number.

1191856861614 is an abundant number, since it is smaller than the sum of its proper divisors (1317315478866).

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

1191856861614 is a wasteful number, since it uses less digits than its factorization.

1191856861614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10454884775.

The product of its digits is 2488320, while the sum is 57.

The spelling of 1191856861614 in words is "one trillion, one hundred ninety-one billion, eight hundred fifty-six million, eight hundred sixty-one thousand, six hundred fourteen".