25180611856 has 15 divisors (see below), whose sum is σ = 48788665303. Its totient is φ = 12589988560.

The previous prime is 25180611851. The next prime is 25180611881. The reversal of 25180611856 is 65811608152.

The square root of 25180611856 is 158684.

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 (25180611851) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 614901 + ... + 654571.

Almost surely, 2^25180611856 is an apocalyptic number.

25180611856 is the 158684-th square number.

It is an amenable number.

25180611856 is a deficient number, since it is larger than the sum of its proper divisors (23608053447).

25180611856 is an frugal number, since it uses more digits than its factorization.

25180611856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79350 (or 39673 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 25180611856 in words is "twenty-five billion, one hundred eighty million, six hundred eleven thousand, eight hundred fifty-six".