1159906985781 has 8 divisors (see below), whose sum is σ = 1637515744704. Its totient is φ = 727784775360.

The previous prime is 1159906985773. The next prime is 1159906985803. The reversal of 1159906985781 is 1875896099511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1159906985781 - 2³ = 1159906985773 is a prime.

It is a super-2 number, since 2×1159906985781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159906985711) by changing a digit.

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, 11371637065 + ... + 11371637166.

It is an arithmetic number, because the mean of its divisors is an integer number (204689468088).

Almost surely, 2^{1159906985781} is an apocalyptic number.

It is an amenable number.

1159906985781 is a deficient number, since it is larger than the sum of its proper divisors (477608758923).

1159906985781 is a wasteful number, since it uses less digits than its factorization.

1159906985781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22743274251.

The product of its (nonzero) digits is 48988800, while the sum is 69.

The spelling of 1159906985781 in words is "one trillion, one hundred fifty-nine billion, nine hundred six million, nine hundred eighty-five thousand, seven hundred eighty-one".