261416050564530 has 64 divisors (see below), whose sum is σ = 664401205347840. Its totient is φ = 65600733640704.

The previous prime is 261416050564517. The next prime is 261416050564561. The reversal of 261416050564530 is 35465050614162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 261416050564530.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33879370 + ... + 40873509.

It is an arithmetic number, because the mean of its divisors is an integer number (10381268833560).

Almost surely, 2^{261416050564530} is an apocalyptic number.

261416050564530 is an abundant number, since it is smaller than the sum of its proper divisors (402985154783310).

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

261416050564530 is a wasteful number, since it uses less digits than its factorization.

261416050564530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74759763.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 261416050564530 in words is "two hundred sixty-one trillion, four hundred sixteen billion, fifty million, five hundred sixty-four thousand, five hundred thirty".