869964449461 has 2 divisors, whose sum is σ = 869964449462. Its totient is φ = 869964449460.

The previous prime is 869964449449. The next prime is 869964449479. The reversal of 869964449461 is 164944469968.

869964449461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541944796561 + 328019652900 = 736169^2 + 572730^2 .

It is a cyclic number.

It is not a de Polignac number, because 869964449461 - 2²¹ = 869962352309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869964449401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434982224730 + 434982224731.

It is an arithmetic number, because the mean of its divisors is an integer number (434982224731).

Almost surely, 2^869964449461 is an apocalyptic number.

It is an amenable number.

869964449461 is a deficient number, since it is larger than the sum of its proper divisors (1).

869964449461 is an equidigital number, since it uses as much as digits as its factorization.

869964449461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322486272, while the sum is 70.

The spelling of 869964449461 in words is "eight hundred sixty-nine billion, nine hundred sixty-four million, four hundred forty-nine thousand, four hundred sixty-one".