3957512646 has 32 divisors (see below), whose sum is σ = 8081297280. Its totient is φ = 1291719744.

The previous prime is 3957512633. The next prime is 3957512653. The reversal of 3957512646 is 6462157593.

It is a junction number, because it is equal to n+sod(n) for n = 3957512595 and 3957512604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28381 + ... + 93383.

It is an arithmetic number, because the mean of its divisors is an integer number (252540540).

Almost surely, 2^3957512646 is an apocalyptic number.

3957512646 is an abundant number, since it is smaller than the sum of its proper divisors (4123784634).

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

3957512646 is a wasteful number, since it uses less digits than its factorization.

3957512646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65220.

The product of its digits is 1360800, while the sum is 48.

The square root of 3957512646 is about 62908.7644609239. The cubic root of 3957512646 is about 1581.7606616030.

The spelling of 3957512646 in words is "three billion, nine hundred fifty-seven million, five hundred twelve thousand, six hundred forty-six".