265561104642 has 16 divisors (see below), whose sum is σ = 532819089120. Its totient is φ = 88237554912.

The previous prime is 265561104629. The next prime is 265561104671. The reversal of 265561104642 is 246401165562.

It is a super-3 number, since 3×265561104642³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 265561104594 and 265561104603.

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, 70701292 + ... + 70705047.

It is an arithmetic number, because the mean of its divisors is an integer number (33301193070).

Almost surely, 2^265561104642 is an apocalyptic number.

265561104642 is an abundant number, since it is smaller than the sum of its proper divisors (267257984478).

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

265561104642 is a wasteful number, since it uses less digits than its factorization.

265561104642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141406657.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 265561104642 in words is "two hundred sixty-five billion, five hundred sixty-one million, one hundred four thousand, six hundred forty-two".