2725734176921 has 4 divisors (see below), whose sum is σ = 3115124773632. Its totient is φ = 2336343580212.

The previous prime is 2725734176881. The next prime is 2725734176929. The reversal of 2725734176921 is 1296714375272.

2725734176921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2725734176921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2725734176929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194695298345 + ... + 194695298358.

It is an arithmetic number, because the mean of its divisors is an integer number (778781193408).

Almost surely, 2^{2725734176921} is an apocalyptic number.

It is an amenable number.

2725734176921 is a deficient number, since it is larger than the sum of its proper divisors (389390596711).

2725734176921 is an equidigital number, since it uses as much as digits as its factorization.

2725734176921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389390596710.

The product of its digits is 8890560, while the sum is 56.

The spelling of 2725734176921 in words is "two trillion, seven hundred twenty-five billion, seven hundred thirty-four million, one hundred seventy-six thousand, nine hundred twenty-one".