642505060446 has 16 divisors (see below), whose sum is σ = 1287086073600. Its totient is φ = 213822361368.

The previous prime is 642505060429. The next prime is 642505060469. The reversal of 642505060446 is 644060505246.

It is a super-2 number, since 2×642505060446² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642505060398 and 642505060407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86494006 + ... + 86501433.

It is an arithmetic number, because the mean of its divisors is an integer number (80442879600).

Almost surely, 2^642505060446 is an apocalyptic number.

642505060446 is an abundant number, since it is smaller than the sum of its proper divisors (644581013154).

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

642505060446 is a wasteful number, since it uses less digits than its factorization.

642505060446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172996063.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 642505060446 in words is "six hundred forty-two billion, five hundred five million, sixty thousand, four hundred forty-six".