261337793832 has 96 divisors (see below), whose sum is σ = 746247996000. Its totient is φ = 82394133120.

The previous prime is 261337793789. The next prime is 261337793833. The reversal of 261337793832 is 238397733162.

261337793832 is a `hidden beast` number, since 261 + 3 + 377 + 9 + 3 + 8 + 3 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (261337793833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 692482 + ... + 1001102.

It is an arithmetic number, because the mean of its divisors is an integer number (7773416625).

Almost surely, 2^261337793832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261337793832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373123998000).

261337793832 is an abundant number, since it is smaller than the sum of its proper divisors (484910202168).

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

261337793832 is a wasteful number, since it uses less digits than its factorization.

261337793832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309271 (or 309264 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 54.

The spelling of 261337793832 in words is "two hundred sixty-one billion, three hundred thirty-seven million, seven hundred ninety-three thousand, eight hundred thirty-two".