1267511161255 has 4 divisors (see below), whose sum is σ = 1521013393512. Its totient is φ = 1014008929000.

The previous prime is 1267511161223. The next prime is 1267511161277. The reversal of 1267511161255 is 5521611157621.

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

It is not a de Polignac number, because 1267511161255 - 2⁵ = 1267511161223 is a prime.

It is a super-2 number, since 2×1267511161255² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126751116121 + ... + 126751116130.

It is an arithmetic number, because the mean of its divisors is an integer number (380253348378).

Almost surely, 2^{1267511161255} is an apocalyptic number.

1267511161255 is a deficient number, since it is larger than the sum of its proper divisors (253502232257).

1267511161255 is an equidigital number, since it uses as much as digits as its factorization.

1267511161255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253502232256.

The product of its digits is 126000, while the sum is 43.

The spelling of 1267511161255 in words is "one trillion, two hundred sixty-seven billion, five hundred eleven million, one hundred sixty-one thousand, two hundred fifty-five".