638750700757 has 32 divisors (see below), whose sum is σ = 716640220800. Its totient is φ = 565261901568.

The previous prime is 638750700701. The next prime is 638750700769. The reversal of 638750700757 is 757007057836.

It is not a de Polignac number, because 638750700757 - 2³⁵ = 604390962389 is a prime.

It is a super-3 number, since 3×638750700757³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 638750700698 and 638750700707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638750730757) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 112870594 + ... + 112876252.

It is an arithmetic number, because the mean of its divisors is an integer number (22395006900).

Almost surely, 2^638750700757 is an apocalyptic number.

It is an amenable number.

638750700757 is a deficient number, since it is larger than the sum of its proper divisors (77889520043).

638750700757 is a wasteful number, since it uses less digits than its factorization.

638750700757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7765.

The product of its (nonzero) digits is 8643600, while the sum is 55.

The spelling of 638750700757 in words is "six hundred thirty-eight billion, seven hundred fifty million, seven hundred thousand, seven hundred fifty-seven".