1199377813851 has 64 divisors (see below), whose sum is σ = 2083773404160. Its totient is φ = 667501067520.

The previous prime is 1199377813849. The next prime is 1199377813883. The reversal of 1199377813851 is 1583187739911.

It is not a de Polignac number, because 1199377813851 - 2¹ = 1199377813849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1199377813801) 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 63 ways as a sum of consecutive naturals, for example, 4416825 + ... + 4680501.

It is an arithmetic number, because the mean of its divisors is an integer number (32558959440).

Almost surely, 2^{1199377813851} is an apocalyptic number.

1199377813851 is a deficient number, since it is larger than the sum of its proper divisors (884395590309).

1199377813851 is a wasteful number, since it uses less digits than its factorization.

1199377813851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264321 (or 264315 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 63.

The spelling of 1199377813851 in words is "one trillion, one hundred ninety-nine billion, three hundred seventy-seven million, eight hundred thirteen thousand, eight hundred fifty-one".