83911605625 has 15 divisors (see below), whose sum is σ = 104864992617. Its totient is φ = 67123491000.

The previous prime is 83911605623. The next prime is 83911605629. The reversal of 83911605625 is 52650611938.

The square root of 83911605625 is 289675.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6578669881 + 77332935744 = 81109^2 + 278088^2 .

It is not a de Polignac number, because 83911605625 - 2¹ = 83911605623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83911605623) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 7236082 + ... + 7247668.

Almost surely, 2^83911605625 is an apocalyptic number.

83911605625 is the 289675-th square number.

83911605625 is the 144838-th centered octagonal number.

It is an amenable number.

83911605625 is a deficient number, since it is larger than the sum of its proper divisors (20953386992).

83911605625 is an frugal number, since it uses more digits than its factorization.

83911605625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23194 (or 11592 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 83911605625 in words is "eighty-three billion, nine hundred eleven million, six hundred five thousand, six hundred twenty-five".