79555900225 has 12 divisors (see below), whose sum is σ = 98691528700. Its totient is φ = 63617486400.

The previous prime is 79555900223. The next prime is 79555900231. The reversal of 79555900225 is 52200955597.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1331082256 + 78224817969 = 36484^2 + 279687^2 .

It is not a de Polignac number, because 79555900225 - 2¹ = 79555900223 is a prime.

It is a super-2 number, since 2×79555900225² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (79555900223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 621150 + ... + 738199.

Almost surely, 2^79555900225 is an apocalyptic number.

It is an amenable number.

79555900225 is a deficient number, since it is larger than the sum of its proper divisors (19135628475).

79555900225 is a wasteful number, since it uses less digits than its factorization.

79555900225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361700 (or 1361695 counting only the distinct ones).

The product of its (nonzero) digits is 1417500, while the sum is 49.

The spelling of 79555900225 in words is "seventy-nine billion, five hundred fifty-five million, nine hundred thousand, two hundred twenty-five".