261423423032 has 64 divisors (see below), whose sum is σ = 538823232000. Its totient is φ = 118355174784.

The previous prime is 261423423017. The next prime is 261423423043. The reversal of 261423423032 is 230324324162.

It is a super-2 number, since 2×261423423032² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261423423032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4526594 + ... + 4583982.

It is an arithmetic number, because the mean of its divisors is an integer number (8419113000).

Almost surely, 2^261423423032 is an apocalyptic number.

It is an amenable number.

261423423032 is an abundant number, since it is smaller than the sum of its proper divisors (277399808968).

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

261423423032 is a wasteful number, since it uses less digits than its factorization.

261423423032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58740 (or 58736 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 261423423032 its reverse (230324324162), we get a palindrome (491747747194).

The spelling of 261423423032 in words is "two hundred sixty-one billion, four hundred twenty-three million, four hundred twenty-three thousand, thirty-two".