25595520196 has 27 divisors (see below), whose sum is σ = 45156254479. Its totient is φ = 12694569128.

The previous prime is 25595520193. The next prime is 25595520211. The reversal of 25595520196 is 69102559552.

The square root of 25595520196 is 159986.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25595520191) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 53435085 + ... + 53435563.

Almost surely, 2^25595520196 is an apocalyptic number.

25595520196 is the 159986-th square number.

It is an amenable number.

25595520196 is a deficient number, since it is larger than the sum of its proper divisors (19560734283).

25595520196 is an frugal number, since it uses more digits than its factorization.

25595520196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 1215000, while the sum is 49.

Multiplying 25595520196 by its sum of digits (49), we get a square (1254180489604 = 1119902²).

The spelling of 25595520196 in words is "twenty-five billion, five hundred ninety-five million, five hundred twenty thousand, one hundred ninety-six".