3661617412525 has 12 divisors (see below), whose sum is σ = 4542406722100. Its totient is φ = 2928002878080.

The previous prime is 3661617412511. The next prime is 3661617412559. The reversal of 3661617412525 is 5252147161663.

It can be written as a sum of positive squares in 6 ways, for example, as 1642654918921 + 2018962493604 = 1281661^2 + 1420902^2 .

It is not a de Polignac number, because 3661617412525 - 2¹⁷ = 3661617281453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32218440 + ... + 32331889.

Almost surely, 2^{3661617412525} is an apocalyptic number.

It is an amenable number.

3661617412525 is a deficient number, since it is larger than the sum of its proper divisors (880789309575).

3661617412525 is a wasteful number, since it uses less digits than its factorization.

3661617412525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64552608 (or 64552603 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The spelling of 3661617412525 in words is "three trillion, six hundred sixty-one billion, six hundred seventeen million, four hundred twelve thousand, five hundred twenty-five".