2128246235561 has 8 divisors (see below), whose sum is σ = 2254839482880. Its totient is φ = 2001808798528.

The previous prime is 2128246235509. The next prime is 2128246235569. The reversal of 2128246235561 is 1655326428212.

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

It is a cyclic number.

It is not a de Polignac number, because 2128246235561 - 2²² = 2128242041257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2128246235569) 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, 38924441 + ... + 38979078.

It is an arithmetic number, because the mean of its divisors is an integer number (281854935360).

Almost surely, 2^{2128246235561} is an apocalyptic number.

It is an amenable number.

2128246235561 is a deficient number, since it is larger than the sum of its proper divisors (126593247319).

2128246235561 is a wasteful number, since it uses less digits than its factorization.

2128246235561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77905143.

The product of its digits is 1382400, while the sum is 47.

The spelling of 2128246235561 in words is "two trillion, one hundred twenty-eight billion, two hundred forty-six million, two hundred thirty-five thousand, five hundred sixty-one".