42210661406 has 4 divisors (see below), whose sum is σ = 63315992112. Its totient is φ = 21105330702.

The previous prime is 42210661399. The next prime is 42210661439. The reversal of 42210661406 is 60416601224.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552665350 + ... + 10552665353.

It is an arithmetic number, because the mean of its divisors is an integer number (15828998028).

Almost surely, 2^42210661406 is an apocalyptic number.

42210661406 is a deficient number, since it is larger than the sum of its proper divisors (21105330706).

42210661406 is a wasteful number, since it uses less digits than its factorization.

42210661406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21105330705.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 42210661406 in words is "forty-two billion, two hundred ten million, six hundred sixty-one thousand, four hundred six".