1115511056020 has 24 divisors (see below), whose sum is σ = 2405886008904. Its totient is φ = 434144843136.

The previous prime is 1115511056017. The next prime is 1115511056029. The reversal of 1115511056020 is 206501155111.

It can be written as a sum of positive squares in 4 ways, for example, as 57386118916 + 1058124937104 = 239554^2 + 1028652^2 .

It is a super-2 number, since 2×1115511056020² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1115511056020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115511056029) 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, 753722947 + ... + 753724426.

It is an arithmetic number, because the mean of its divisors is an integer number (100245250371).

Almost surely, 2^{1115511056020} is an apocalyptic number.

1115511056020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115511056020 is an abundant number, since it is smaller than the sum of its proper divisors (1290374952884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115511056020 is a wasteful number, since it uses less digits than its factorization.

1115511056020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507447419 (or 1507447417 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 28.

Subtracting from 1115511056020 its reverse (206501155111), we obtain a palindrome (909009900909).

The spelling of 1115511056020 in words is "one trillion, one hundred fifteen billion, five hundred eleven million, fifty-six thousand, twenty".