261450408939 has 8 divisors (see below), whose sum is σ = 348606720000. Its totient is φ = 174297185256.

The previous prime is 261450408931. The next prime is 261450408983. The reversal of 261450408939 is 939804054162.

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

It is not a de Polignac number, because 261450408939 - 2³ = 261450408931 is a prime.

It is a super-2 number, since 2×261450408939² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261450408891 and 261450408900.

It is not an unprimeable number, because it can be changed into a prime (261450408931) 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, 566439 + ... + 918560.

It is an arithmetic number, because the mean of its divisors is an integer number (43575840000).

Almost surely, 2^261450408939 is an apocalyptic number.

261450408939 is a deficient number, since it is larger than the sum of its proper divisors (87156311061).

261450408939 is a wasteful number, since it uses less digits than its factorization.

261450408939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543689.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 261450408939 in words is "two hundred sixty-one billion, four hundred fifty million, four hundred eight thousand, nine hundred thirty-nine".