2651443656061 has 4 divisors (see below), whose sum is σ = 2723104295452. Its totient is φ = 2579783016672.

The previous prime is 2651443656053. The next prime is 2651443656077. The reversal of 2651443656061 is 1606563441562.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1560515630436 + 1090928025625 = 1249206^2 + 1044475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651443656061 - 2³ = 2651443656053 is a prime.

It is a super-2 number, since 2×2651443656061² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2651443655996 and 2651443656014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651443656091) 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, 35830319640 + ... + 35830319713.

It is an arithmetic number, because the mean of its divisors is an integer number (680776073863).

Almost surely, 2^{2651443656061} is an apocalyptic number.

It is an amenable number.

2651443656061 is a deficient number, since it is larger than the sum of its proper divisors (71660639391).

2651443656061 is an equidigital number, since it uses as much as digits as its factorization.

2651443656061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71660639390.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 2651443656061 in words is "two trillion, six hundred fifty-one billion, four hundred forty-three million, six hundred fifty-six thousand, sixty-one".