261411788473 has 8 divisors (see below), whose sum is σ = 285637209120. Its totient is φ = 237263153280.

The previous prime is 261411788441. The next prime is 261411788497. The reversal of 261411788473 is 374887114162.

It is a happy number.

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 261411788473 - 2⁵ = 261411788441 is a prime.

It is a super-2 number, since 2×261411788473² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261411788473.

It is not an unprimeable number, because it can be changed into a prime (261411788423) 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, 19189240 + ... + 19202857.

It is an arithmetic number, because the mean of its divisors is an integer number (35704651140).

Almost surely, 2^261411788473 is an apocalyptic number.

It is an amenable number.

261411788473 is a deficient number, since it is larger than the sum of its proper divisors (24225420647).

261411788473 is a wasteful number, since it uses less digits than its factorization.

261411788473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38392727.

The product of its digits is 1806336, while the sum is 52.

The spelling of 261411788473 in words is "two hundred sixty-one billion, four hundred eleven million, seven hundred eighty-eight thousand, four hundred seventy-three".