42646406402 has 16 divisors (see below), whose sum is σ = 66181571640. Its totient is φ = 20586018432.

The previous prime is 42646406389. The next prime is 42646406441. The reversal of 42646406402 is 20460464624.

It can be written as a sum of positive squares in 4 ways, for example, as 37962235921 + 4684170481 = 194839^2 + 68441^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756548 + ... + 810960.

Almost surely, 2^42646406402 is an apocalyptic number.

42646406402 is a deficient number, since it is larger than the sum of its proper divisors (23535165238).

42646406402 is a wasteful number, since it uses less digits than its factorization.

42646406402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67957.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 42646406402 in words is "forty-two billion, six hundred forty-six million, four hundred six thousand, four hundred two".