11655402531271 has 8 divisors (see below), whose sum is σ = 11882817650880. Its totient is φ = 11428265258592.

The previous prime is 11655402531257. The next prime is 11655402531323. The reversal of 11655402531271 is 17213520455611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11655402531271 - 2¹⁵ = 11655402498503 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 (11655402531221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69377016 + ... + 69544813.

It is an arithmetic number, because the mean of its divisors is an integer number (1485352206360).

Almost surely, 2^{11655402531271} is an apocalyptic number.

11655402531271 is a deficient number, since it is larger than the sum of its proper divisors (227415119609).

11655402531271 is a wasteful number, since it uses less digits than its factorization.

11655402531271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138923465.

The product of its (nonzero) digits is 252000, while the sum is 43.

Adding to 11655402531271 its reverse (17213520455611), we get a palindrome (28868922986882).

The spelling of 11655402531271 in words is "eleven trillion, six hundred fifty-five billion, four hundred two million, five hundred thirty-one thousand, two hundred seventy-one".