39613869542025 has 27 divisors (see below), whose sum is σ = 70953010988821. Its totient is φ = 21127346737440.

The previous prime is 39613869541993. The next prime is 39613869542053. The reversal of 39613869542025 is 52024596831693.

It is a happy number.

The square root of 39613869542025 is 6293955.

It is a perfect power (a square), and thus also a powerful number.

39613869542025 is a `hidden beast` number, since 3 + 9 + 6 + 1 + 3 + 8 + 69 + 542 + 0 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18934586229321 + 20679283312704 = 4351389^2 + 4547448^2 .

It is not a de Polignac number, because 39613869542025 - 2⁵ = 39613869541993 is a prime.

It is a super-2 number, since 2×39613869542025² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 94199527 + ... + 94619123.

Almost surely, 2^{39613869542025} is an apocalyptic number.

39613869542025 is the 6293955-th square number.

39613869542025 is the 3146978-th centered octagonal number.

It is an amenable number.

39613869542025 is a deficient number, since it is larger than the sum of its proper divisors (31339141446796).

39613869542025 is an frugal number, since it uses more digits than its factorization.

39613869542025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839210 (or 419605 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 63.

The spelling of 39613869542025 in words is "thirty-nine trillion, six hundred thirteen billion, eight hundred sixty-nine million, five hundred forty-two thousand, twenty-five".