2157071544761 has 16 divisors (see below), whose sum is σ = 2502930672000. Its totient is φ = 1820659040640.

The previous prime is 2157071544721. The next prime is 2157071544779. The reversal of 2157071544761 is 1674451707512.

It is a cyclic number.

It is not a de Polignac number, because 2157071544761 - 2⁶ = 2157071544697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157071544721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452741 + ... + 2125821.

It is an arithmetic number, because the mean of its divisors is an integer number (156433167000).

Almost surely, 2^{2157071544761} is an apocalyptic number.

It is an amenable number.

2157071544761 is a deficient number, since it is larger than the sum of its proper divisors (345859127239).

2157071544761 is a wasteful number, since it uses less digits than its factorization.

2157071544761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675904.

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 2157071544761 in words is "two trillion, one hundred fifty-seven billion, seventy-one million, five hundred forty-four thousand, seven hundred sixty-one".