1111445557 has 2 divisors, whose sum is σ = 1111445558. Its totient is φ = 1111445556.

The previous prime is 1111445551. The next prime is 1111445591. The reversal of 1111445557 is 7555441111.

It is an a-pointer prime, because the next prime (1111445591) can be obtained adding 1111445557 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1073610756 + 37834801 = 32766^2 + 6151^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111445557 - 2¹⁹ = 1110921269 is a prime.

It is a super-2 number, since 2×1111445557² = 2470622452350080498, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111445551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555722778 + 555722779.

It is an arithmetic number, because the mean of its divisors is an integer number (555722779).

Almost surely, 2^1111445557 is an apocalyptic number.

It is an amenable number.

1111445557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111445557 is an equidigital number, since it uses as much as digits as its factorization.

1111445557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 34.

The square root of 1111445557 is about 33338.3496442160. The cubic root of 1111445557 is about 1035.8480783401.

Adding to 1111445557 its reverse (7555441111), we get a palindrome (8666886668).

The spelling of 1111445557 in words is "one billion, one hundred eleven million, four hundred forty-five thousand, five hundred fifty-seven".