1155667311531 has 24 divisors (see below), whose sum is σ = 1714741104960. Its totient is φ = 749478738816.

The previous prime is 1155667311523. The next prime is 1155667311571. The reversal of 1155667311531 is 1351137665511.

It is a happy number.

1155667311531 is a `hidden beast` number, since 1 + 1 + 5 + 56 + 67 + 3 + 1 + 1 + 531 = 666.

It is not a de Polignac number, because 1155667311531 - 2³ = 1155667311523 is a prime.

It is a super-2 number, since 2×1155667311531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155667311571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1426830 + ... + 2084988.

It is an arithmetic number, because the mean of its divisors is an integer number (71447546040).

Almost surely, 2^{1155667311531} is an apocalyptic number.

1155667311531 is a deficient number, since it is larger than the sum of its proper divisors (559073793429).

1155667311531 is a wasteful number, since it uses less digits than its factorization.

1155667311531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663475 (or 663472 counting only the distinct ones).

The product of its digits is 283500, while the sum is 45.

The spelling of 1155667311531 in words is "one trillion, one hundred fifty-five billion, six hundred sixty-seven million, three hundred eleven thousand, five hundred thirty-one".