642274106840 has 64 divisors (see below), whose sum is σ = 1521282988800. Its totient is φ = 243370887552.

The previous prime is 642274106813. The next prime is 642274106857. The reversal of 642274106840 is 48601472246.

It is a junction number, because it is equal to n+sod(n) for n = 642274106791 and 642274106800.

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, 17509559 + ... + 17546201.

It is an arithmetic number, because the mean of its divisors is an integer number (23770046700).

Almost surely, 2^642274106840 is an apocalyptic number.

It is an amenable number.

642274106840 is an abundant number, since it is smaller than the sum of its proper divisors (879008881960).

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

642274106840 is a wasteful number, since it uses less digits than its factorization.

642274106840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59736 (or 59732 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 642274106840 in words is "six hundred forty-two billion, two hundred seventy-four million, one hundred six thousand, eight hundred forty".