261422572234065 has 32 divisors (see below), whose sum is σ = 468633682325376. Its totient is φ = 123324653237760.

The previous prime is 261422572233997. The next prime is 261422572234067. The reversal of 261422572234065 is 560432275224162.

It is not a de Polignac number, because 261422572234065 - 2⁹ = 261422572233553 is a prime.

It is a super-2 number, since 2×261422572234065² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261422572233999 and 261422572234017.

It is not an unprimeable number, because it can be changed into a prime (261422572234067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21410523972 + ... + 21410536181.

It is an arithmetic number, because the mean of its divisors is an integer number (14644802572668).

Almost surely, 2^{261422572234065} is an apocalyptic number.

It is an amenable number.

261422572234065 is a deficient number, since it is larger than the sum of its proper divisors (207211110091311).

261422572234065 is a wasteful number, since it uses less digits than its factorization.

261422572234065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42821060209.

The product of its (nonzero) digits is 9676800, while the sum is 51.

The spelling of 261422572234065 in words is "two hundred sixty-one trillion, four hundred twenty-two billion, five hundred seventy-two million, two hundred thirty-four thousand, sixty-five".