261619214417 has 8 divisors (see below), whose sum is σ = 285406504032. Its totient is φ = 237832545600.

The previous prime is 261619214393. The next prime is 261619214471. The reversal of 261619214417 is 714412916162.

261619214417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261619214417 - 2⁸ = 261619214161 is a prime.

It is a super-2 number, since 2×261619214417² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261619214477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429817 + ... + 1602377.

It is an arithmetic number, because the mean of its divisors is an integer number (35675813004).

Almost surely, 2^261619214417 is an apocalyptic number.

It is an amenable number.

261619214417 is a deficient number, since it is larger than the sum of its proper divisors (23787289615).

261619214417 is a wasteful number, since it uses less digits than its factorization.

261619214417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310399.

The product of its digits is 145152, while the sum is 44.

The spelling of 261619214417 in words is "two hundred sixty-one billion, six hundred nineteen million, two hundred fourteen thousand, four hundred seventeen".