261303162140 has 12 divisors (see below), whose sum is σ = 548736640536. Its totient is φ = 104521264848.

The previous prime is 261303162119. The next prime is 261303162149. The reversal of 261303162140 is 41261303162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261303162149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6532579034 + ... + 6532579073.

It is an arithmetic number, because the mean of its divisors is an integer number (45728053378).

Almost surely, 2^261303162140 is an apocalyptic number.

261303162140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261303162140 is an abundant number, since it is smaller than the sum of its proper divisors (287433478396).

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

261303162140 is a wasteful number, since it uses less digits than its factorization.

261303162140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13065158116 (or 13065158114 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 261303162140 in words is "two hundred sixty-one billion, three hundred three million, one hundred sixty-two thousand, one hundred forty".