3945792729220 has 24 divisors (see below), whose sum is σ = 8773586186904. Its totient is φ = 1485474909696.

The previous prime is 3945792729181. The next prime is 3945792729251. The reversal of 3945792729220 is 229272975493.

It can be written as a sum of positive squares in 4 ways, for example, as 1158275317824 + 2787517411396 = 1076232^2 + 1669586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5802636027 + ... + 5802636706.

It is an arithmetic number, because the mean of its divisors is an integer number (365566091121).

Almost surely, 2^{3945792729220} is an apocalyptic number.

It is an amenable number.

3945792729220 is an abundant number, since it is smaller than the sum of its proper divisors (4827793457684).

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

3945792729220 is a wasteful number, since it uses less digits than its factorization.

3945792729220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11605272759 (or 11605272757 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 61.

The spelling of 3945792729220 in words is "three trillion, nine hundred forty-five billion, seven hundred ninety-two million, seven hundred twenty-nine thousand, two hundred twenty".