12961856662419 has 16 divisors (see below), whose sum is σ = 20210735528192. Its totient is φ = 7234524648288.

The previous prime is 12961856662373. The next prime is 12961856662439. The reversal of 12961856662419 is 91426665816921.

It is not a de Polignac number, because 12961856662419 - 2⁸ = 12961856662163 is a prime.

It is a super-2 number, since 2×12961856662419² (a number of 27 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 12961856662419.

It is not an unprimeable number, because it can be changed into a prime (12961856662439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7177106884 + ... + 7177108689.

It is an arithmetic number, because the mean of its divisors is an integer number (1263170970512).

Almost surely, 2^{12961856662419} is an apocalyptic number.

12961856662419 is a deficient number, since it is larger than the sum of its proper divisors (7248878865773).

12961856662419 is a wasteful number, since it uses less digits than its factorization.

12961856662419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14354215626.

The product of its digits is 67184640, while the sum is 66.

The spelling of 12961856662419 in words is "twelve trillion, nine hundred sixty-one billion, eight hundred fifty-six million, six hundred sixty-two thousand, four hundred nineteen".