61205025605 has 8 divisors (see below), whose sum is σ = 73826581272. Its totient is φ = 48710320128.

The previous prime is 61205025571. The next prime is 61205025631. The reversal of 61205025605 is 50652050216.

It can be written as a sum of positive squares in 4 ways, for example, as 115971361 + 61089054244 = 10769^2 + 247162^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61205025605 - 2¹⁴ = 61205009221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31711484 + ... + 31713413.

It is an arithmetic number, because the mean of its divisors is an integer number (9228322659).

Almost surely, 2^61205025605 is an apocalyptic number.

It is an amenable number.

61205025605 is a deficient number, since it is larger than the sum of its proper divisors (12621555667).

61205025605 is a wasteful number, since it uses less digits than its factorization.

61205025605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63425095.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 61205025605 in words is "sixty-one billion, two hundred five million, twenty-five thousand, six hundred five".