2645725957771 has 4 divisors (see below), whose sum is σ = 2849243339152. Its totient is φ = 2442208576392.

The previous prime is 2645725957741. The next prime is 2645725957783. The reversal of 2645725957771 is 1777595275462.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2645725957771 - 2⁵ = 2645725957739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2645725957697 and 2645725957706.

It is not an unprimeable number, because it can be changed into a prime (2645725957711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101758690671 + ... + 101758690696.

It is an arithmetic number, because the mean of its divisors is an integer number (712310834788).

Almost surely, 2^{2645725957771} is an apocalyptic number.

2645725957771 is a deficient number, since it is larger than the sum of its proper divisors (203517381381).

2645725957771 is a wasteful number, since it uses less digits than its factorization.

2645725957771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203517381380.

The product of its digits is 259308000, while the sum is 67.

The spelling of 2645725957771 in words is "two trillion, six hundred forty-five billion, seven hundred twenty-five million, nine hundred fifty-seven thousand, seven hundred seventy-one".