3953645972 has 12 divisors (see below), whose sum is σ = 6919418100. Its totient is φ = 1976669376.

The previous prime is 3953645963. The next prime is 3953646023. The reversal of 3953645972 is 2795463593.

It can be written as a sum of positive squares in 2 ways, for example, as 1668232336 + 2285413636 = 40844^2 + 47806^2 .

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 3 ways as a sum of consecutive naturals, for example, 35168 + ... + 95624.

It is an arithmetic number, because the mean of its divisors is an integer number (576618175).

Almost surely, 2^3953645972 is an apocalyptic number.

It is an amenable number.

3953645972 is a deficient number, since it is larger than the sum of its proper divisors (2965772128).

3953645972 is a wasteful number, since it uses less digits than its factorization.

3953645972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76810 (or 76808 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 53.

The square root of 3953645972 is about 62878.0245554836. The cubic root of 3953645972 is about 1581.2453424808.

The spelling of 3953645972 in words is "three billion, nine hundred fifty-three million, six hundred forty-five thousand, nine hundred seventy-two".