642623060976 has 160 divisors (see below), whose sum is σ = 1893601926720. Its totient is φ = 186037420032.

The previous prime is 642623060903. The next prime is 642623060977. The reversal of 642623060976 is 679060326246.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642623060977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39336906 + ... + 39353238.

It is an arithmetic number, because the mean of its divisors is an integer number (11835012042).

Almost surely, 2^642623060976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642623060976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946800963360).

642623060976 is an abundant number, since it is smaller than the sum of its proper divisors (1250978865744).

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

642623060976 is a wasteful number, since it uses less digits than its factorization.

642623060976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20083 (or 20077 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 51.

The spelling of 642623060976 in words is "six hundred forty-two billion, six hundred twenty-three million, sixty thousand, nine hundred seventy-six".