1011871553000 has 128 divisors (see below), whose sum is σ = 2952036921600. Its totient is φ = 315388512000.

The previous prime is 1011871552973. The next prime is 1011871553047. The reversal of 1011871553000 is 3551781101.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6493595 + ... + 6647594.

It is an arithmetic number, because the mean of its divisors is an integer number (23062788450).

Almost surely, 2^{1011871553000} is an apocalyptic number.

1011871553000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011871553000 is an abundant number, since it is smaller than the sum of its proper divisors (1940165368600).

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

1011871553000 is a wasteful number, since it uses less digits than its factorization.

1011871553000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13141228 (or 13141214 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 32.

The spelling of 1011871553000 in words is "one trillion, eleven billion, eight hundred seventy-one million, five hundred fifty-three thousand".