1421605655631 has 18 divisors (see below), whose sum is σ = 2388684333672. Its totient is φ = 812346088680.

The previous prime is 1421605655609. The next prime is 1421605655651. The reversal of 1421605655631 is 1365565061241.

1421605655631 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 6 + 0 + 5 + 6 + 5 + 5 + 631 = 666.

It is not a de Polignac number, because 1421605655631 - 2¹⁰ = 1421605654607 is a prime.

It is a super-2 number, since 2×1421605655631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421605655651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1611797355 + ... + 1611798236.

It is an arithmetic number, because the mean of its divisors is an integer number (132704685204).

Almost surely, 2^{1421605655631} is an apocalyptic number.

1421605655631 is a deficient number, since it is larger than the sum of its proper divisors (967078678041).

1421605655631 is a wasteful number, since it uses less digits than its factorization.

1421605655631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223595611 (or 3223595601 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 1421605655631 in words is "one trillion, four hundred twenty-one billion, six hundred five million, six hundred fifty-five thousand, six hundred thirty-one".