261180594340 has 12 divisors (see below), whose sum is σ = 548479248156. Its totient is φ = 104472237728.

The previous prime is 261180594331. The next prime is 261180594347. The reversal of 261180594340 is 43495081162.

It can be written as a sum of positive squares in 2 ways, for example, as 33588625984 + 227591968356 = 183272^2 + 477066^2 .

It is not an unprimeable number, because it can be changed into a prime (261180594347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6529514839 + ... + 6529514878.

It is an arithmetic number, because the mean of its divisors is an integer number (45706604013).

Almost surely, 2^261180594340 is an apocalyptic number.

261180594340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261180594340 is an abundant number, since it is smaller than the sum of its proper divisors (287298653816).

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

261180594340 is a wasteful number, since it uses less digits than its factorization.

261180594340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13059029726 (or 13059029724 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 261180594340 in words is "two hundred sixty-one billion, one hundred eighty million, five hundred ninety-four thousand, three hundred forty".