11871145726477 has 4 divisors (see below), whose sum is σ = 11872893803616. Its totient is φ = 11869397649340.

The previous prime is 11871145726459. The next prime is 11871145726499. The reversal of 11871145726477 is 77462754117811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11871145726477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11871145727477) 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, 874028383 + ... + 874041964.

It is an arithmetic number, because the mean of its divisors is an integer number (2968223450904).

Almost surely, 2^{11871145726477} is an apocalyptic number.

It is an amenable number.

11871145726477 is a deficient number, since it is larger than the sum of its proper divisors (1748077139).

11871145726477 is an equidigital number, since it uses as much as digits as its factorization.

11871145726477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748077138.

The product of its digits is 18439680, while the sum is 61.

The spelling of 11871145726477 in words is "eleven trillion, eight hundred seventy-one billion, one hundred forty-five million, seven hundred twenty-six thousand, four hundred seventy-seven".