3975129680 has 20 divisors (see below), whose sum is σ = 9242176692. Its totient is φ = 1590051840.

The previous prime is 3975129679. The next prime is 3975129713. The reversal of 3975129680 is 869215793.

It can be written as a sum of positive squares in 2 ways, for example, as 560363584 + 3414766096 = 23672^2 + 58436^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24844481 + ... + 24844640.

Almost surely, 2^3975129680 is an apocalyptic number.

It is an amenable number.

3975129680 is an abundant number, since it is smaller than the sum of its proper divisors (5267047012).

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

3975129680 is a wasteful number, since it uses less digits than its factorization.

3975129680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49689134 (or 49689128 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 3975129680 is about 63048.6294855011. The cubic root of 3975129680 is about 1584.1042788370.

The spelling of 3975129680 in words is "three billion, nine hundred seventy-five million, one hundred twenty-nine thousand, six hundred eighty".