2646406406 has 48 divisors (see below), whose sum is σ = 4664992176. Its totient is φ = 1122637824.

The previous prime is 2646406391. The next prime is 2646406423. The reversal of 2646406406 is 6046046462.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2646406406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7496726 + ... + 7497078.

It is an arithmetic number, because the mean of its divisors is an integer number (97187337).

Almost surely, 2^2646406406 is an apocalyptic number.

2646406406 is a deficient number, since it is larger than the sum of its proper divisors (2018585770).

2646406406 is a wasteful number, since it uses less digits than its factorization.

2646406406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 2646406406 is about 51443.2347933137. The cubic root of 2646406406 is about 1383.2016968787.

The spelling of 2646406406 in words is "two billion, six hundred forty-six million, four hundred six thousand, four hundred six".