2646401859 has 6 divisors (see below), whose sum is σ = 3822580476. Its totient is φ = 1764267900.

The previous prime is 2646401851. The next prime is 2646401869. The reversal of 2646401859 is 9581046462.

2646401859 is a `hidden beast` number, since 2 + 6 + 464 + 0 + 185 + 9 = 666.

It is not a de Polignac number, because 2646401859 - 2³ = 2646401851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2646401851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147022317 + ... + 147022334.

It is an arithmetic number, because the mean of its divisors is an integer number (637096746).

Almost surely, 2^2646401859 is an apocalyptic number.

2646401859 is a deficient number, since it is larger than the sum of its proper divisors (1176178617).

2646401859 is a wasteful number, since it uses less digits than its factorization.

2646401859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294044657 (or 294044654 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 2646401859 is about 51443.1905989510. The cubic root of 2646401859 is about 1383.2009046822.

The spelling of 2646401859 in words is "two billion, six hundred forty-six million, four hundred one thousand, eight hundred fifty-nine".