261262336056152 has 16 divisors (see below), whose sum is σ = 489869236016160. Its totient is φ = 130630539785184.

The previous prime is 261262336056133. The next prime is 261262336056221. The reversal of 261262336056152 is 251650633262162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 261262336056152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76760603 + ... + 80091914.

It is an arithmetic number, because the mean of its divisors is an integer number (30616827251010).

Almost surely, 2^{261262336056152} is an apocalyptic number.

It is an amenable number.

261262336056152 is a deficient number, since it is larger than the sum of its proper divisors (228606899960008).

261262336056152 is a wasteful number, since it uses less digits than its factorization.

261262336056152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157060730 (or 157060726 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 261262336056152 in words is "two hundred sixty-one trillion, two hundred sixty-two billion, three hundred thirty-six million, fifty-six thousand, one hundred fifty-two".