261427180212705 has 16 divisors (see below), whose sum is σ = 450459141289920. Its totient is φ = 128702611796928.

The previous prime is 261427180212629. The next prime is 261427180212761. The reversal of 261427180212705 is 507212081724162.

It is not a de Polignac number, because 261427180212705 - 2¹³ = 261427180204513 is a prime.

It is a super-2 number, since 2×261427180212705² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670326102915 + ... + 670326103304.

It is an arithmetic number, because the mean of its divisors is an integer number (28153696330620).

Almost surely, 2^{261427180212705} is an apocalyptic number.

It is an amenable number.

261427180212705 is a deficient number, since it is larger than the sum of its proper divisors (189031961077215).

261427180212705 is a wasteful number, since it uses less digits than its factorization.

261427180212705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340652206240.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 261427180212705 in words is "two hundred sixty-one trillion, four hundred twenty-seven billion, one hundred eighty million, two hundred twelve thousand, seven hundred five".