639372160757 has 8 divisors (see below), whose sum is σ = 707907304992. Its totient is φ = 572572083600.

The previous prime is 639372160627. The next prime is 639372160793. The reversal of 639372160757 is 757061273936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 639372160757 - 2¹⁶ = 639372095221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639372163757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433765994 + ... + 433767467.

It is an arithmetic number, because the mean of its divisors is an integer number (88488413124).

Almost surely, 2^639372160757 is an apocalyptic number.

639372160757 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

639372160757 is a deficient number, since it is larger than the sum of its proper divisors (68535144235).

639372160757 is a wasteful number, since it uses less digits than its factorization.

639372160757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867533539.

The product of its (nonzero) digits is 10001880, while the sum is 56.

The spelling of 639372160757 in words is "six hundred thirty-nine billion, three hundred seventy-two million, one hundred sixty thousand, seven hundred fifty-seven".