261988018014 has 16 divisors (see below), whose sum is σ = 524028071952. Its totient is φ = 87320666688.

The previous prime is 261988017989. The next prime is 261988018031. The reversal of 261988018014 is 410810889162.

It is a congruent 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, 2102559 + ... + 2223674.

It is an arithmetic number, because the mean of its divisors is an integer number (32751754497).

Almost surely, 2^261988018014 is an apocalyptic number.

261988018014 is an abundant number, since it is smaller than the sum of its proper divisors (262040053938).

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

261988018014 is a wasteful number, since it uses less digits than its factorization.

261988018014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4336331.

The product of its (nonzero) digits is 221184, while the sum is 48.

The spelling of 261988018014 in words is "two hundred sixty-one billion, nine hundred eighty-eight million, eighteen thousand, fourteen".