3985531955 has 16 divisors (see below), whose sum is σ = 4832877504. Its totient is φ = 3154982400.

The previous prime is 3985531939. The next prime is 3985531967. The reversal of 3985531955 is 5591355893.

It is not a de Polignac number, because 3985531955 - 2⁴ = 3985531939 is a prime.

It is a super-2 number, since 2×3985531955² = 31768929928652244050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3985531897 and 3985531906.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 925367 + ... + 929663.

It is an arithmetic number, because the mean of its divisors is an integer number (302054844).

Almost surely, 2^3985531955 is an apocalyptic number.

3985531955 is a deficient number, since it is larger than the sum of its proper divisors (847345549).

3985531955 is a wasteful number, since it uses less digits than its factorization.

3985531955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6206.

The product of its digits is 3645000, while the sum is 53.

The square root of 3985531955 is about 63131.0696487870. The cubic root of 3985531955 is about 1585.4848573209.

The spelling of 3985531955 in words is "three billion, nine hundred eighty-five million, five hundred thirty-one thousand, nine hundred fifty-five".