1166311451587 has 4 divisors (see below), whose sum is σ = 1170292037040. Its totient is φ = 1162330866136.

The previous prime is 1166311451567. The next prime is 1166311451593. The reversal of 1166311451587 is 7851541136611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166311451587 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1166311451587.

It is not an unprimeable number, because it can be changed into a prime (1166311451567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990292287 + ... + 1990292872.

It is an arithmetic number, because the mean of its divisors is an integer number (292573009260).

Almost surely, 2^{1166311451587} is an apocalyptic number.

1166311451587 is a deficient number, since it is larger than the sum of its proper divisors (3980585453).

1166311451587 is an equidigital number, since it uses as much as digits as its factorization.

1166311451587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980585452.

The product of its digits is 604800, while the sum is 49.

The spelling of 1166311451587 in words is "one trillion, one hundred sixty-six billion, three hundred eleven million, four hundred fifty-one thousand, five hundred eighty-seven".