639937060450 has 24 divisors (see below), whose sum is σ = 1203656906340. Its totient is φ = 253098700800.

The previous prime is 639937060429. The next prime is 639937060459. The reversal of 639937060450 is 54060739936.

It can be written as a sum of positive squares in 6 ways, for example, as 130936146201 + 509000914249 = 361851^2 + 713443^2 .

It is not an unprimeable number, because it can be changed into a prime (639937060459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71898591 + ... + 71907490.

Almost surely, 2^639937060450 is an apocalyptic number.

639937060450 is a deficient number, since it is larger than the sum of its proper divisors (563719845890).

639937060450 is a wasteful number, since it uses less digits than its factorization.

639937060450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143806182 (or 143806177 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 52.

The spelling of 639937060450 in words is "six hundred thirty-nine billion, nine hundred thirty-seven million, sixty thousand, four hundred fifty".