261262336056104 has 8 divisors (see below), whose sum is σ = 489866880105210. Its totient is φ = 130631168028048.

The previous prime is 261262336056103. The next prime is 261262336056131. The reversal of 261262336056104 is 401650633262162.

It can be written as a sum of positive squares in only one way, i.e., 250500196531204 + 10762139524900 = 15827198^2 + 3280570^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (261262336056101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16328896003499 + ... + 16328896003514.

Almost surely, 2^{261262336056104} is an apocalyptic number.

It is an amenable number.

261262336056104 is a deficient number, since it is larger than the sum of its proper divisors (228604544049106).

261262336056104 is a wasteful number, since it uses less digits than its factorization.

261262336056104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32657792007019 (or 32657792007015 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 261262336056104 in words is "two hundred sixty-one trillion, two hundred sixty-two billion, three hundred thirty-six million, fifty-six thousand, one hundred four".