261776016342 has 48 divisors (see below), whose sum is σ = 568204971360. Its totient is φ = 87101329536.

The previous prime is 261776016323. The next prime is 261776016343. The reversal of 261776016342 is 243610677162.

261776016342 is a `hidden beast` number, since 2 + 6 + 1 + 7 + 7 + 6 + 0 + 1 + 634 + 2 = 666.

261776016342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261776016343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31653384 + ... + 31661652.

It is an arithmetic number, because the mean of its divisors is an integer number (11837603570).

Almost surely, 2^261776016342 is an apocalyptic number.

261776016342 is an abundant number, since it is smaller than the sum of its proper divisors (306428955018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261776016342 is a wasteful number, since it uses less digits than its factorization.

261776016342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11237 (or 11234 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 261776016342 in words is "two hundred sixty-one billion, seven hundred seventy-six million, sixteen thousand, three hundred forty-two".