1123056828917 has 18 divisors (see below), whose sum is σ = 1196348495202. Its totient is φ = 1053793284544.

The previous prime is 1123056828877. The next prime is 1123056828967. The reversal of 1123056828917 is 7198286503211.

It can be written as a sum of positive squares in 3 ways, for example, as 560235783121 + 562821045796 = 748489^2 + 750214^2 .

It is not a de Polignac number, because 1123056828917 - 2¹² = 1123056824821 is a prime.

It is a super-2 number, since 2×1123056828917² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123056828967) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 177443009 + ... + 177449337.

It is an arithmetic number, because the mean of its divisors is an integer number (66463805289).

Almost surely, 2^{1123056828917} is an apocalyptic number.

It is an amenable number.

1123056828917 is a deficient number, since it is larger than the sum of its proper divisors (73291666285).

1123056828917 is an frugal number, since it uses more digits than its factorization.

1123056828917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12757 (or 6405 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

Multiplying 1123056828917 by its sum of digits (53), we get a square (59522011932601 = 7715051²).

1123056828917 divided by its sum of digits (53) gives a square (21189751489 = 145567²).

The spelling of 1123056828917 in words is "one trillion, one hundred twenty-three billion, fifty-six million, eight hundred twenty-eight thousand, nine hundred seventeen".