11895297871 has 4 divisors (see below), whose sum is σ = 12521366200. Its totient is φ = 11269229544.

The previous prime is 11895297859. The next prime is 11895297907. The reversal of 11895297871 is 17879259811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11895297871 - 2¹⁷ = 11895166799 is a prime.

It is a super-2 number, since 2×11895297871² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11895297671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313034136 + ... + 313034173.

It is an arithmetic number, because the mean of its divisors is an integer number (3130341550).

Almost surely, 2^11895297871 is an apocalyptic number.

11895297871 is a deficient number, since it is larger than the sum of its proper divisors (626068329).

11895297871 is an equidigital number, since it uses as much as digits as its factorization.

11895297871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626068328.

The product of its digits is 2540160, while the sum is 58.

The spelling of 11895297871 in words is "eleven billion, eight hundred ninety-five million, two hundred ninety-seven thousand, eight hundred seventy-one".