2142651328681 has 8 divisors (see below), whose sum is σ = 2192609121824. Its totient is φ = 2092699385280.

The previous prime is 2142651328663. The next prime is 2142651328709. The reversal of 2142651328681 is 1868231562412.

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 2142651328681 - 2¹¹ = 2142651326633 is a prime.

It is a super-2 number, since 2×2142651328681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142651325681) 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, 716955 + ... + 2190736.

It is an arithmetic number, because the mean of its divisors is an integer number (274076140228).

Almost surely, 2^{2142651328681} is an apocalyptic number.

It is an amenable number.

2142651328681 is a deficient number, since it is larger than the sum of its proper divisors (49957793143).

2142651328681 is a wasteful number, since it uses less digits than its factorization.

2142651328681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924871.

The product of its digits is 1105920, while the sum is 49.

The spelling of 2142651328681 in words is "two trillion, one hundred forty-two billion, six hundred fifty-one million, three hundred twenty-eight thousand, six hundred eighty-one".