11865400829023 has 6 divisors (see below), whose sum is σ = 13802609127696. Its totient is φ = 10170343567692.

The previous prime is 11865400829021. The next prime is 11865400829047. The reversal of 11865400829023 is 32092800456811.

It is not a de Polignac number, because 11865400829023 - 2¹ = 11865400829021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 242151037327 = 11865400829023 / (1 + 1 + 8 + 6 + 5 + 4 + 0 + 0 + 8 + 2 + 9 + 0 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11865400829021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121075518615 + ... + 121075518712.

It is an arithmetic number, because the mean of its divisors is an integer number (2300434854616).

Almost surely, 2^{11865400829023} is an apocalyptic number.

11865400829023 is a deficient number, since it is larger than the sum of its proper divisors (1937208298673).

11865400829023 is an equidigital number, since it uses as much as digits as its factorization.

11865400829023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242151037341 (or 242151037334 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 11865400829023 in words is "eleven trillion, eight hundred sixty-five billion, four hundred million, eight hundred twenty-nine thousand, twenty-three".