1123156215345 has 16 divisors (see below), whose sum is σ = 1800208218240. Its totient is φ = 597963890304.

The previous prime is 1123156215341. The next prime is 1123156215409. The reversal of 1123156215345 is 5435126513211.

It is not a de Polignac number, because 1123156215345 - 2² = 1123156215341 is a prime.

It is a super-2 number, since 2×1123156215345² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123156215341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65788549 + ... + 65805618.

It is an arithmetic number, because the mean of its divisors is an integer number (112513013640).

Almost surely, 2^{1123156215345} is an apocalyptic number.

1123156215345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123156215345 is a deficient number, since it is larger than the sum of its proper divisors (677052002895).

1123156215345 is a wasteful number, since it uses less digits than its factorization.

1123156215345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131594744.

The product of its digits is 108000, while the sum is 39.

The spelling of 1123156215345 in words is "one trillion, one hundred twenty-three billion, one hundred fifty-six million, two hundred fifteen thousand, three hundred forty-five".