639930200481 has 24 divisors (see below), whose sum is σ = 1085942160576. Its totient is φ = 358002908640.

The previous prime is 639930200477. The next prime is 639930200519. The reversal of 639930200481 is 184002039936.

It is a happy number.

639930200481 is a `hidden beast` number, since 63 + 9 + 93 + 0 + 20 + 0 + 481 = 666.

It is not a de Polignac number, because 639930200481 - 2² = 639930200477 is a prime.

It is a super-2 number, since 2×639930200481² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (639930200381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248611845 + ... + 248614418.

It is an arithmetic number, because the mean of its divisors is an integer number (45247590024).

Almost surely, 2^639930200481 is an apocalyptic number.

It is an amenable number.

639930200481 is a deficient number, since it is larger than the sum of its proper divisors (446011960095).

639930200481 is a wasteful number, since it uses less digits than its factorization.

639930200481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497226293 (or 497226290 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 639930200481 in words is "six hundred thirty-nine billion, nine hundred thirty million, two hundred thousand, four hundred eighty-one".