1264289421171 has 16 divisors (see below), whose sum is σ = 1938355506944. Its totient is φ = 718018880544.

The previous prime is 1264289421169. The next prime is 1264289421203. The reversal of 1264289421171 is 1711249824621.

It is not a de Polignac number, because 1264289421171 - 2¹ = 1264289421169 is a prime.

It is a super-2 number, since 2×1264289421171² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1264289421171.

It is not an unprimeable number, because it can be changed into a prime (1264289421121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184672216 + ... + 184679061.

It is an arithmetic number, because the mean of its divisors is an integer number (121147219184).

Almost surely, 2^{1264289421171} is an apocalyptic number.

1264289421171 is a deficient number, since it is larger than the sum of its proper divisors (674066085773).

1264289421171 is a wasteful number, since it uses less digits than its factorization.

1264289421171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369351450.

The product of its digits is 387072, while the sum is 48.

The spelling of 1264289421171 in words is "one trillion, two hundred sixty-four billion, two hundred eighty-nine million, four hundred twenty-one thousand, one hundred seventy-one".