79025643225 has 45 divisors (see below), whose sum is σ = 146406245007. Its totient is φ = 42140262960.

The previous prime is 79025643223. The next prime is 79025643227. The reversal of 79025643225 is 52234652097.

The square root of 79025643225 is 281115.

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

79025643225 is a `hidden beast` number, since 79 + 0 + 256 + 4 + 322 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (79025643223) and next prime (79025643227).

It can be written as a sum of positive squares in only one way, i.e., 28449231561 + 50576411664 = 168669^2 + 224892^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 79025643225 - 2¹ = 79025643223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (79025643223) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 12647052 + ... + 12653298.

Almost surely, 2^79025643225 is an apocalyptic number.

79025643225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79025643225 is the 281115-th square number.

79025643225 is the 140558-th centered octagonal number.

It is an amenable number.

79025643225 is a deficient number, since it is larger than the sum of its proper divisors (67380601782).

79025643225 is an frugal number, since it uses more digits than its factorization.

79025643225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12516 (or 6255 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 79025643225 in words is "seventy-nine billion, twenty-five million, six hundred forty-three thousand, two hundred twenty-five".