11311531445 has 16 divisors (see below), whose sum is σ = 14226433920. Its totient is φ = 8617629504.

The previous prime is 11311531411. The next prime is 11311531457. The reversal of 11311531445 is 54413511311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311531445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190550 + ... + 242759.

It is an arithmetic number, because the mean of its divisors is an integer number (889152120).

Almost surely, 2^11311531445 is an apocalyptic number.

It is an amenable number.

11311531445 is a deficient number, since it is larger than the sum of its proper divisors (2914902475).

11311531445 is a wasteful number, since it uses less digits than its factorization.

11311531445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433564.

The product of its digits is 3600, while the sum is 29.

The spelling of 11311531445 in words is "eleven billion, three hundred eleven million, five hundred thirty-one thousand, four hundred forty-five".