61405564600225 has 6 divisors (see below), whose sum is σ = 76142900104310. Its totient is φ = 49124451680160.

The previous prime is 61405564600207. The next prime is 61405564600267. The reversal of 61405564600225 is 52200646550416.

It can be written as a sum of positive squares in 3 ways, for example, as 6615472067136 + 54790092533089 = 2572056^2 + 7402033^2 .

It is not a de Polignac number, because 61405564600225 - 2³⁹ = 60855808786337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228111291980 + ... + 1228111292029.

Almost surely, 2^{61405564600225} is an apocalyptic number.

It is an amenable number.

61405564600225 is a deficient number, since it is larger than the sum of its proper divisors (14737335504085).

61405564600225 is a wasteful number, since it uses less digits than its factorization.

61405564600225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456222584019 (or 2456222584014 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 61405564600225 in words is "sixty-one trillion, four hundred five billion, five hundred sixty-four million, six hundred thousand, two hundred twenty-five".