261154506401412 has 24 divisors (see below), whose sum is σ = 656234400701376. Its totient is φ = 80355232738848.

The previous prime is 261154506401357. The next prime is 261154506401429. The reversal of 261154506401412 is 214104605451162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837033674208 + ... + 837033674519.

It is an arithmetic number, because the mean of its divisors is an integer number (27343100029224).

Almost surely, 2^{261154506401412} is an apocalyptic number.

It is an amenable number.

261154506401412 is an abundant number, since it is smaller than the sum of its proper divisors (395079894299964).

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

261154506401412 is a wasteful number, since it uses less digits than its factorization.

261154506401412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674067348747 (or 1674067348745 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 261154506401412 in words is "two hundred sixty-one trillion, one hundred fifty-four billion, five hundred six million, four hundred one thousand, four hundred twelve".