261656345503676 has 6 divisors (see below), whose sum is σ = 457898604631440. Its totient is φ = 130828172751836.

The previous prime is 261656345503661. The next prime is 261656345503691. The reversal of 261656345503676 is 676305543656162.

It is an interprime number because it is at equal distance from previous prime (261656345503661) and next prime (261656345503691).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32707043187956 + ... + 32707043187963.

It is an arithmetic number, because the mean of its divisors is an integer number (76316434105240).

Almost surely, 2^{261656345503676} is an apocalyptic number.

It is an amenable number.

261656345503676 is a deficient number, since it is larger than the sum of its proper divisors (196242259127764).

261656345503676 is a wasteful number, since it uses less digits than its factorization.

261656345503676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65414086375923 (or 65414086375921 counting only the distinct ones).

The product of its (nonzero) digits is 489888000, while the sum is 65.

The spelling of 261656345503676 in words is "two hundred sixty-one trillion, six hundred fifty-six billion, three hundred forty-five million, five hundred three thousand, six hundred seventy-six".