261047313999 has 8 divisors (see below), whose sum is σ = 386736761520. Its totient is φ = 174031542648.

The previous prime is 261047313997. The next prime is 261047314013. The reversal of 261047313999 is 999313740162.

It is a happy number.

261047313999 is a `hidden beast` number, since 2 + 610 + 4 + 7 + 3 + 13 + 9 + 9 + 9 = 666.

It is not a de Polignac number, because 261047313999 - 2¹ = 261047313997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261047313997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4834209492 + ... + 4834209545.

It is an arithmetic number, because the mean of its divisors is an integer number (48342095190).

Almost surely, 2^261047313999 is an apocalyptic number.

261047313999 is a deficient number, since it is larger than the sum of its proper divisors (125689447521).

261047313999 is an equidigital number, since it uses as much as digits as its factorization.

261047313999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9668419046 (or 9668419040 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The spelling of 261047313999 in words is "two hundred sixty-one billion, forty-seven million, three hundred thirteen thousand, nine hundred ninety-nine".