642355654424 has 64 divisors (see below), whose sum is σ = 1338931088640. Its totient is φ = 286421349760.

The previous prime is 642355654417. The next prime is 642355654459. The reversal of 642355654424 is 424456553246.

642355654424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46665767 + ... + 46679529.

It is an arithmetic number, because the mean of its divisors is an integer number (20920798260).

Almost surely, 2^642355654424 is an apocalyptic number.

It is an amenable number.

642355654424 is an abundant number, since it is smaller than the sum of its proper divisors (696575434216).

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

642355654424 is a wasteful number, since it uses less digits than its factorization.

642355654424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23840 (or 23836 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 50.

The spelling of 642355654424 in words is "six hundred forty-two billion, three hundred fifty-five million, six hundred fifty-four thousand, four hundred twenty-four".