642106427480 has 64 divisors (see below), whose sum is σ = 1722919127040. Its totient is φ = 210579000192.

The previous prime is 642106427437. The next prime is 642106427513. The reversal of 642106427480 is 84724601246.

It is a super-2 number, since 2×642106427480² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49846544 + ... + 49859423.

It is an arithmetic number, because the mean of its divisors is an integer number (26920611360).

Almost surely, 2^642106427480 is an apocalyptic number.

It is an amenable number.

642106427480 is an abundant number, since it is smaller than the sum of its proper divisors (1080812699560).

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

642106427480 is a wasteful number, since it uses less digits than its factorization.

642106427480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99706008 (or 99706004 counting only the distinct ones).

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

The spelling of 642106427480 in words is "six hundred forty-two billion, one hundred six million, four hundred twenty-seven thousand, four hundred eighty".