1101543253656 has 64 divisors (see below), whose sum is σ = 2831700309600. Its totient is φ = 356826083328.

The previous prime is 1101543253607. The next prime is 1101543253687. The reversal of 1101543253656 is 6563523451011.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12025 + ... + 1484328.

Almost surely, 2^{1101543253656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101543253656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415850154800).

1101543253656 is an abundant number, since it is smaller than the sum of its proper divisors (1730157055944).

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

1101543253656 is a wasteful number, since it uses less digits than its factorization.

1101543253656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497228 (or 1497224 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 1101543253656 in words is "one trillion, one hundred one billion, five hundred forty-three million, two hundred fifty-three thousand, six hundred fifty-six".