1125512665644 has 24 divisors (see below), whose sum is σ = 2626331642368. Its totient is φ = 375151542480.

The previous prime is 1125512665619. The next prime is 1125512665649. The reversal of 1125512665644 is 4465662155211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1125512665593 and 1125512665602.

It is not an unprimeable number, because it can be changed into a prime (1125512665649) 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, 2174872 + ... + 2642175.

Almost surely, 2^{1125512665644} is an apocalyptic number.

It is an amenable number.

1125512665644 is an abundant number, since it is smaller than the sum of its proper divisors (1500818976724).

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

1125512665644 is a wasteful number, since it uses less digits than its factorization.

1125512665644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836525 (or 4836523 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The spelling of 1125512665644 in words is "one trillion, one hundred twenty-five billion, five hundred twelve million, six hundred sixty-five thousand, six hundred forty-four".