639616057570 has 96 divisors (see below), whose sum is σ = 1420869150720. Its totient is φ = 206118743040.

The previous prime is 639616057547. The next prime is 639616057571. The reversal of 639616057570 is 75750616936.

It is a super-2 number, since 2×639616057570² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (639616057571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 911890 + ... + 1452850.

It is an arithmetic number, because the mean of its divisors is an integer number (14800720320).

Almost surely, 2^639616057570 is an apocalyptic number.

639616057570 is an abundant number, since it is smaller than the sum of its proper divisors (781253093150).

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

639616057570 is a wasteful number, since it uses less digits than its factorization.

639616057570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541128 (or 541121 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 55.

The spelling of 639616057570 in words is "six hundred thirty-nine billion, six hundred sixteen million, fifty-seven thousand, five hundred seventy".