11352197581 has 16 divisors (see below), whose sum is σ = 11821392000. Its totient is φ = 10888371648.

The previous prime is 11352197579. The next prime is 11352197599. The reversal of 11352197581 is 18579125311.

It is a cyclic number.

It is not a de Polignac number, because 11352197581 - 2¹ = 11352197579 is a prime.

It is a super-2 number, since 2×11352197581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11352197081) 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, 5060046 + ... + 5062288.

It is an arithmetic number, because the mean of its divisors is an integer number (738837000).

Almost surely, 2^11352197581 is an apocalyptic number.

It is an amenable number.

11352197581 is a deficient number, since it is larger than the sum of its proper divisors (469194419).

11352197581 is a wasteful number, since it uses less digits than its factorization.

11352197581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348.

The product of its digits is 75600, while the sum is 43.

The spelling of 11352197581 in words is "eleven billion, three hundred fifty-two million, one hundred ninety-seven thousand, five hundred eighty-one".