261543646345162 has 32 divisors (see below), whose sum is σ = 415811565000000. Its totient is φ = 123035027158656.

The previous prime is 261543646345139. The next prime is 261543646345171.

261543646345162 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 261543646345097 and 261543646345106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26613589 + ... + 35090887.

It is an arithmetic number, because the mean of its divisors is an integer number (12994111406250).

Almost surely, 2^{261543646345162} is an apocalyptic number.

261543646345162 is a deficient number, since it is larger than the sum of its proper divisors (154267918654838).

261543646345162 is a wasteful number, since it uses less digits than its factorization.

261543646345162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8482918.

The product of its digits is 74649600, while the sum is 58.

The spelling of 261543646345162 in words is "two hundred sixty-one trillion, five hundred forty-three billion, six hundred forty-six million, three hundred forty-five thousand, one hundred sixty-two".