2625226641661 has 16 divisors (see below), whose sum is σ = 2927059354800. Its totient is φ = 2337801596928.

The previous prime is 2625226641629. The next prime is 2625226641721. The reversal of 2625226641661 is 1661466225262.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 118736065561 + 2506490576100 = 344581^2 + 1583190^2 .

It is a cyclic number.

It is not a de Polignac number, because 2625226641661 - 2⁵ = 2625226641629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2625226641761) 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, 2402106 + ... + 3319723.

It is an arithmetic number, because the mean of its divisors is an integer number (182941209675).

Almost surely, 2^{2625226641661} is an apocalyptic number.

It is an amenable number.

2625226641661 is a deficient number, since it is larger than the sum of its proper divisors (301832713139).

2625226641661 is a wasteful number, since it uses less digits than its factorization.

2625226641661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723088.

The product of its digits is 2488320, while the sum is 49.

The spelling of 2625226641661 in words is "two trillion, six hundred twenty-five billion, two hundred twenty-six million, six hundred forty-one thousand, six hundred sixty-one".