642821649414 has 32 divisors (see below), whose sum is σ = 1471577642496. Its totient is φ = 183379451520.

The previous prime is 642821649377. The next prime is 642821649433. The reversal of 642821649414 is 414946128246.

It is a happy number.

642821649414 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, 11800707 + ... + 11855054.

It is an arithmetic number, because the mean of its divisors is an integer number (45986801328).

Almost surely, 2^642821649414 is an apocalyptic number.

642821649414 is an abundant number, since it is smaller than the sum of its proper divisors (828755993082).

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

642821649414 is a wasteful number, since it uses less digits than its factorization.

642821649414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23656420.

The product of its digits is 2654208, while the sum is 51.

The spelling of 642821649414 in words is "six hundred forty-two billion, eight hundred twenty-one million, six hundred forty-nine thousand, four hundred fourteen".