26156415567661 has 32 divisors (see below), whose sum is σ = 27291873853440. Its totient is φ = 25051226112000.

The previous prime is 26156415567643. The next prime is 26156415567679. The reversal of 26156415567661 is 16676551465162.

It is an interprime number because it is at equal distance from previous prime (26156415567643) and next prime (26156415567679).

It is a cyclic number.

It is not a de Polignac number, because 26156415567661 - 2²³ = 26156407179053 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 26156415567661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26156412567661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1135200301 + ... + 1135223341.

It is an arithmetic number, because the mean of its divisors is an integer number (852871057920).

Almost surely, 2^{26156415567661} is an apocalyptic number.

It is an amenable number.

26156415567661 is a deficient number, since it is larger than the sum of its proper divisors (1135458285779).

26156415567661 is a wasteful number, since it uses less digits than its factorization.

26156415567661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25965.

The product of its digits is 54432000, while the sum is 61.

The spelling of 26156415567661 in words is "twenty-six trillion, one hundred fifty-six billion, four hundred fifteen million, five hundred sixty-seven thousand, six hundred sixty-one".