39450018855625 has 135 divisors (see below), whose sum is σ = 60554266656147. Its totient is φ = 25614114624000.

The previous prime is 39450018855593. The next prime is 39450018855713. The reversal of 39450018855625 is 52655881005493.

The square root of 39450018855625 is 6280925.

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

It can be written as a sum of positive squares in 7 ways, for example, as 30932073078921 + 8517945776704 = 5561661^2 + 2918552^2 .

It is not a de Polignac number, because 39450018855625 - 2⁵ = 39450018855593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 20884074681 + ... + 20884076569.

Almost surely, 2^{39450018855625} is an apocalyptic number.

39450018855625 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

39450018855625 is the 6280925-th square number.

39450018855625 is the 3140463-rd centered octagonal number.

It is an amenable number.

39450018855625 is a deficient number, since it is larger than the sum of its proper divisors (21104247800522).

39450018855625 is an frugal number, since it uses more digits than its factorization.

39450018855625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850 (or 1920 counting only the distinct ones).

The product of its (nonzero) digits is 51840000, while the sum is 61.

The spelling of 39450018855625 in words is "thirty-nine trillion, four hundred fifty billion, eighteen million, eight hundred fifty-five thousand, six hundred twenty-five".