3997087135172 has 12 divisors (see below), whose sum is σ = 7236106020780. Its totient is φ = 1929628272096.

The previous prime is 3997087135159. The next prime is 3997087135183. The reversal of 3997087135172 is 2715317807993.

It can be written as a sum of positive squares in 2 ways, for example, as 3327727530436 + 669359604736 = 1824206^2 + 818144^2 .

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, 17228823743 + ... + 17228823974.

It is an arithmetic number, because the mean of its divisors is an integer number (603008835065).

Almost surely, 2^{3997087135172} is an apocalyptic number.

It is an amenable number.

3997087135172 is a deficient number, since it is larger than the sum of its proper divisors (3239018885608).

3997087135172 is a wasteful number, since it uses less digits than its factorization.

3997087135172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34457647750 (or 34457647748 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 62.

The spelling of 3997087135172 in words is "three trillion, nine hundred ninety-seven billion, eighty-seven million, one hundred thirty-five thousand, one hundred seventy-two".