28261780161262 has 16 divisors (see below), whose sum is σ = 42421320129600. Its totient is φ = 14121340672608.

The previous prime is 28261780161259. The next prime is 28261780161281. The reversal of 28261780161262 is 26216108716282.

It is a congruent number.

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, 118990168 + ... + 119227444.

It is an arithmetic number, because the mean of its divisors is an integer number (2651332508100).

Almost surely, 2^{28261780161262} is an apocalyptic number.

28261780161262 is a deficient number, since it is larger than the sum of its proper divisors (14159539968338).

28261780161262 is a wasteful number, since it uses less digits than its factorization.

28261780161262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277275.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 28261780161262 in words is "twenty-eight trillion, two hundred sixty-one billion, seven hundred eighty million, one hundred sixty-one thousand, two hundred sixty-two".