412517887661 has 12 divisors (see below), whose sum is σ = 453498651900. Its totient is φ = 374958450240.

The previous prime is 412517887657. The next prime is 412517887673. The reversal of 412517887661 is 166788715214.

It can be written as a sum of positive squares in 2 ways, for example, as 385578902500 + 26938985161 = 620950^2 + 164131^2 .

It is not a de Polignac number, because 412517887661 - 2² = 412517887657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 412517887597 and 412517887606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412517887861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 535355 + ... + 1054343.

It is an arithmetic number, because the mean of its divisors is an integer number (37791554325).

Almost surely, 2^412517887661 is an apocalyptic number.

It is an amenable number.

412517887661 is a deficient number, since it is larger than the sum of its proper divisors (40980764239).

412517887661 is a wasteful number, since it uses less digits than its factorization.

412517887661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525580 (or 525569 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 56.

The spelling of 412517887661 in words is "four hundred twelve billion, five hundred seventeen million, eight hundred eighty-seven thousand, six hundred sixty-one".