11611143431 has 8 divisors (see below), whose sum is σ = 11650379520. Its totient is φ = 11571949368.

The previous prime is 11611143389. The next prime is 11611143433. The reversal of 11611143431 is 13434111611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11611143431 is a prime.

It is a super-2 number, since 2×11611143431² (a number of 21 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 11611143431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11611143433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602300 + ... + 621278.

It is an arithmetic number, because the mean of its divisors is an integer number (1456297440).

Almost surely, 2^11611143431 is an apocalyptic number.

11611143431 is a deficient number, since it is larger than the sum of its proper divisors (39236089).

11611143431 is a wasteful number, since it uses less digits than its factorization.

11611143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21013.

The product of its digits is 864, while the sum is 26.

The spelling of 11611143431 in words is "eleven billion, six hundred eleven million, one hundred forty-three thousand, four hundred thirty-one".