261022506908 has 24 divisors (see below), whose sum is σ = 471839424000. Its totient is φ = 126216866160.

The previous prime is 261022506907. The next prime is 261022506917. The reversal of 261022506908 is 809605220162.

It is a super-2 number, since 2×261022506908² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261022506907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516266 + ... + 888017.

It is an arithmetic number, because the mean of its divisors is an integer number (19659976000).

Almost surely, 2^261022506908 is an apocalyptic number.

It is an amenable number.

261022506908 is a deficient number, since it is larger than the sum of its proper divisors (210816917092).

261022506908 is a wasteful number, since it uses less digits than its factorization.

261022506908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405817 (or 1405815 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 261022506908 in words is "two hundred sixty-one billion, twenty-two million, five hundred six thousand, nine hundred eight".