261280520958 has 64 divisors (see below), whose sum is σ = 528418368000. Its totient is φ = 86124487680.

The previous prime is 261280520957. The next prime is 261280520971. The reversal of 261280520958 is 859025082162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261280520957) 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, 175473078 + ... + 175474566.

It is an arithmetic number, because the mean of its divisors is an integer number (8256537000).

Almost surely, 2^261280520958 is an apocalyptic number.

261280520958 is an abundant number, since it is smaller than the sum of its proper divisors (267137847042).

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

261280520958 is a wasteful number, since it uses less digits than its factorization.

261280520958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497.

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 261280520958 in words is "two hundred sixty-one billion, two hundred eighty million, five hundred twenty thousand, nine hundred fifty-eight".