642693613740 has 24 divisors (see below), whose sum is σ = 1799542118640. Its totient is φ = 171384963648.

The previous prime is 642693613739. The next prime is 642693613801. The reversal of 642693613740 is 47316396246.

It is a happy number.

It is a super-2 number, since 2×642693613740² (a number of 24 digits) contains 22 as substring.

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, 5355780055 + ... + 5355780174.

It is an arithmetic number, because the mean of its divisors is an integer number (74980921610).

Almost surely, 2^642693613740 is an apocalyptic number.

642693613740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642693613740 is an abundant number, since it is smaller than the sum of its proper divisors (1156848504900).

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

642693613740 is a wasteful number, since it uses less digits than its factorization.

642693613740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711560241 (or 10711560239 counting only the distinct ones).

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

The spelling of 642693613740 in words is "six hundred forty-two billion, six hundred ninety-three million, six hundred thirteen thousand, seven hundred forty".