2656161629 has 6 divisors (see below), whose sum is σ = 2919582750. Its totient is φ = 2414692280.

The previous prime is 2656161559. The next prime is 2656161637. The reversal of 2656161629 is 9261616562.

It can be written as a sum of positive squares in only one way, i.e., 2652456004 + 3705625 = 51502^2 + 1925^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2656161629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2656161629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656161659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10975754 + ... + 10975995.

It is an arithmetic number, because the mean of its divisors is an integer number (486597125).

Almost surely, 2^2656161629 is an apocalyptic number.

It is an amenable number.

2656161629 is a deficient number, since it is larger than the sum of its proper divisors (263421121).

2656161629 is a wasteful number, since it uses less digits than its factorization.

2656161629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21951771 (or 21951760 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The square root of 2656161629 is about 51537.9629884612. The cubic root of 2656161629 is about 1384.8992057394.

The spelling of 2656161629 in words is "two billion, six hundred fifty-six million, one hundred sixty-one thousand, six hundred twenty-nine".