642235045554 has 48 divisors (see below), whose sum is σ = 1438597165824. Its totient is φ = 206855215200.

The previous prime is 642235045549. The next prime is 642235045561. The reversal of 642235045554 is 455540532246.

642235045554 is a `hidden beast` number, since 6 + 4 + 2 + 2 + 3 + 50 + 45 + 554 = 666.

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, 516912 + ... + 1245659.

It is an arithmetic number, because the mean of its divisors is an integer number (29970774288).

Almost surely, 2^642235045554 is an apocalyptic number.

642235045554 is an abundant number, since it is smaller than the sum of its proper divisors (796362120270).

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

642235045554 is a wasteful number, since it uses less digits than its factorization.

642235045554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763263 (or 1763260 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 45.

The spelling of 642235045554 in words is "six hundred forty-two billion, two hundred thirty-five million, forty-five thousand, five hundred fifty-four".