1267331538291 has 16 divisors (see below), whose sum is σ = 2079723550464. Its totient is φ = 668482569504.

The previous prime is 1267331538287. The next prime is 1267331538307. The reversal of 1267331538291 is 1928351337621.

It is a happy number.

It is not a de Polignac number, because 1267331538291 - 2² = 1267331538287 is a prime.

It is a super-2 number, since 2×1267331538291² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1267331538241) 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, 2321119761 + ... + 2321120306.

It is an arithmetic number, because the mean of its divisors is an integer number (129982721904).

Almost surely, 2^{1267331538291} is an apocalyptic number.

1267331538291 is a deficient number, since it is larger than the sum of its proper divisors (812392012173).

1267331538291 is a wasteful number, since it uses less digits than its factorization.

1267331538291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642240090.

The product of its digits is 1632960, while the sum is 51.

The spelling of 1267331538291 in words is "one trillion, two hundred sixty-seven billion, three hundred thirty-one million, five hundred thirty-eight thousand, two hundred ninety-one".