1405645656 has 32 divisors (see below), whose sum is σ = 3515504640. Its totient is φ = 468363168.

The previous prime is 1405645643. The next prime is 1405645687. The reversal of 1405645656 is 6565465041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59145 + ... + 79431.

It is an arithmetic number, because the mean of its divisors is an integer number (109859520).

Almost surely, 2^1405645656 is an apocalyptic number.

It is an amenable number.

1405645656 is an abundant number, since it is smaller than the sum of its proper divisors (2109858984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1405645656 is a wasteful number, since it uses less digits than its factorization.

1405645656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23183 (or 23179 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The square root of 1405645656 is about 37491.9412140796. The cubic root of 1405645656 is about 1120.1906711943.

The spelling of 1405645656 in words is "one billion, four hundred five million, six hundred forty-five thousand, six hundred fifty-six".