1123637545538 has 8 divisors (see below), whose sum is σ = 1687110351120. Its totient is φ = 561267428500.

The previous prime is 1123637545501. The next prime is 1123637545543. The reversal of 1123637545538 is 8355457363211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1123637545538² (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 1123637545538.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275669588 + ... + 275673663.

It is an arithmetic number, because the mean of its divisors is an integer number (210888793890).

Almost surely, 2^{1123637545538} is an apocalyptic number.

1123637545538 is a deficient number, since it is larger than the sum of its proper divisors (563472805582).

1123637545538 is a wasteful number, since it uses less digits than its factorization.

1123637545538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551344272.

The product of its digits is 9072000, while the sum is 53.

The spelling of 1123637545538 in words is "one trillion, one hundred twenty-three billion, six hundred thirty-seven million, five hundred forty-five thousand, five hundred thirty-eight".