1199887491264 has 112 divisors (see below), whose sum is σ = 3958070474496. Its totient is φ = 311659084800.

The previous prime is 1199887491263. The next prime is 1199887491281. The reversal of 1199887491264 is 4621947889911.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (1199887491263) 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 15 ways as a sum of consecutive naturals, for example, 40565827 + ... + 40595394.

Almost surely, 2^{1199887491264} is an apocalyptic number.

1199887491264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1199887491264 is an abundant number, since it is smaller than the sum of its proper divisors (2758182983232).

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

1199887491264 is a wasteful number, since it uses less digits than its factorization.

1199887491264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81161254 (or 81161244 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 69.

The spelling of 1199887491264 in words is "one trillion, one hundred ninety-nine billion, eight hundred eighty-seven million, four hundred ninety-one thousand, two hundred sixty-four".