261403404304162 has 16 divisors (see below), whose sum is σ = 393621621748992. Its totient is φ = 130196601301360.

The previous prime is 261403404304127. The next prime is 261403404304177.

261403404304162 is nontrivially palindromic in base 10.

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 7 ways as a sum of consecutive naturals, for example, 99767164 + ... + 102353767.

It is an arithmetic number, because the mean of its divisors is an integer number (24601351359312).

Almost surely, 2^{261403404304162} is an apocalyptic number.

261403404304162 is a deficient number, since it is larger than the sum of its proper divisors (132218217444830).

261403404304162 is a wasteful number, since it uses less digits than its factorization.

261403404304162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202123433.

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 261403404304162 in words is "two hundred sixty-one trillion, four hundred three billion, four hundred four million, three hundred four thousand, one hundred sixty-two".