115769887821 has 16 divisors (see below), whose sum is σ = 196012508800. Its totient is φ = 66154221504.

The previous prime is 115769887811. The next prime is 115769887843. The reversal of 115769887821 is 128788967511.

It is not a de Polignac number, because 115769887821 - 2¹⁵ = 115769855053 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115769887811) 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, 306269356 + ... + 306269733.

It is an arithmetic number, because the mean of its divisors is an integer number (12250781800).

Almost surely, 2^115769887821 is an apocalyptic number.

It is an amenable number.

115769887821 is a deficient number, since it is larger than the sum of its proper divisors (80242620979).

115769887821 is an equidigital number, since it uses as much as digits as its factorization.

115769887821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612539105 (or 612539099 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 63.

The spelling of 115769887821 in words is "one hundred fifteen billion, seven hundred sixty-nine million, eight hundred eighty-seven thousand, eight hundred twenty-one".