261440105061064 has 32 divisors (see below), whose sum is σ = 495553731621120. Its totient is φ = 129297194078976.

The previous prime is 261440105061011. The next prime is 261440105061073. The reversal of 261440105061064 is 460160501044162.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296483424 + ... + 297363919.

It is an arithmetic number, because the mean of its divisors is an integer number (15486054113160).

Almost surely, 2^{261440105061064} is an apocalyptic number.

It is an amenable number.

261440105061064 is a deficient number, since it is larger than the sum of its proper divisors (234113626560056).

261440105061064 is a wasteful number, since it uses less digits than its factorization.

261440105061064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593847949 (or 593847945 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 261440105061064 in words is "two hundred sixty-one trillion, four hundred forty billion, one hundred five million, sixty-one thousand, sixty-four".