261326548307 has 8 divisors (see below), whose sum is σ = 285526879680. Its totient is φ = 237200112360.

The previous prime is 261326548303. The next prime is 261326548313. The reversal of 261326548307 is 703845623162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261326548307 - 2² = 261326548303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261326548303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18466457 + ... + 18480602.

It is an arithmetic number, because the mean of its divisors is an integer number (35690859960).

Almost surely, 2^261326548307 is an apocalyptic number.

261326548307 is a deficient number, since it is larger than the sum of its proper divisors (24200331373).

261326548307 is a wasteful number, since it uses less digits than its factorization.

261326548307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36947713.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 261326548307 in words is "two hundred sixty-one billion, three hundred twenty-six million, five hundred forty-eight thousand, three hundred seven".