1118801557 has 4 divisors (see below), whose sum is σ = 1121753920. Its totient is φ = 1115849196.

The previous prime is 1118801533. The next prime is 1118801591. The reversal of 1118801557 is 7551088111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1118801557 - 2¹⁵ = 1118768789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110801557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475613 + ... + 1476370.

It is an arithmetic number, because the mean of its divisors is an integer number (280438480).

Almost surely, 2^1118801557 is an apocalyptic number.

It is an amenable number.

1118801557 is a deficient number, since it is larger than the sum of its proper divisors (2952363).

1118801557 is an equidigital number, since it uses as much as digits as its factorization.

1118801557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952362.

The product of its (nonzero) digits is 11200, while the sum is 37.

The square root of 1118801557 is about 33448.4911019914. The cubic root of 1118801557 is about 1038.1282769706.

Adding to 1118801557 its reverse (7551088111), we get a palindrome (8669889668).

The spelling of 1118801557 in words is "one billion, one hundred eighteen million, eight hundred one thousand, five hundred fifty-seven".