1123580637281 has 4 divisors (see below), whose sum is σ = 1125280457364. Its totient is φ = 1121880817200.

The previous prime is 1123580637251. The next prime is 1123580637299. The reversal of 1123580637281 is 1827360853211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 949925078881 + 173655558400 = 974641^2 + 416720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123580637281 - 2³⁴ = 1106400768097 is a prime.

It is a super-2 number, since 2×1123580637281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123580637241) 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, 849909050 + ... + 849910371.

It is an arithmetic number, because the mean of its divisors is an integer number (281320114341).

Almost surely, 2^{1123580637281} is an apocalyptic number.

It is an amenable number.

1123580637281 is a deficient number, since it is larger than the sum of its proper divisors (1699820083).

1123580637281 is an equidigital number, since it uses as much as digits as its factorization.

1123580637281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699820082.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 1123580637281 in words is "one trillion, one hundred twenty-three billion, five hundred eighty million, six hundred thirty-seven thousand, two hundred eighty-one".