261293198352 has 40 divisors (see below), whose sum is σ = 698283551040. Its totient is φ = 84094362240.

The previous prime is 261293198339. The next prime is 261293198359. The reversal of 261293198352 is 253891392162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261293198295 and 261293198304.

It is not an unprimeable number, because it can be changed into a prime (261293198359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93853924 + ... + 93856707.

It is an arithmetic number, because the mean of its divisors is an integer number (17457088776).

Almost surely, 2^261293198352 is an apocalyptic number.

It is an amenable number.

261293198352 is an abundant number, since it is smaller than the sum of its proper divisors (436990352688).

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

261293198352 is a wasteful number, since it uses less digits than its factorization.

261293198352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187710671 (or 187710665 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The spelling of 261293198352 in words is "two hundred sixty-one billion, two hundred ninety-three million, one hundred ninety-eight thousand, three hundred fifty-two".