1111611357 has 20 divisors (see below), whose sum is σ = 1687784956. Its totient is φ = 728922240.

The previous prime is 1111611341. The next prime is 1111611379. The reversal of 1111611357 is 7531161111.

1111611357 is a `hidden beast` number, since 1 + 1 + 11 + 611 + 35 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 525051396 + 586559961 = 22914^2 + 24219^2 .

It is not a de Polignac number, because 1111611357 - 2⁴ = 1111611341 is a prime.

It is a super-2 number, since 2×1111611357² = 2471359618022762898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 1111611357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111611257) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107548 + ... + 117429.

Almost surely, 2^1111611357 is an apocalyptic number.

It is an amenable number.

1111611357 is a deficient number, since it is larger than the sum of its proper divisors (576173599).

1111611357 is an equidigital number, since it uses as much as digits as its factorization.

1111611357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225050 (or 225041 counting only the distinct ones).

The product of its digits is 630, while the sum is 27.

The square root of 1111611357 is about 33340.8361772767. The cubic root of 1111611357 is about 1035.8995833586.

Adding to 1111611357 its reverse (7531161111), we get a palindrome (8642772468).

The spelling of 1111611357 in words is "one billion, one hundred eleven million, six hundred eleven thousand, three hundred fifty-seven".