61255307905 has 16 divisors (see below), whose sum is σ = 80680734144. Its totient is φ = 44275999680.

The previous prime is 61255307899. The next prime is 61255307921. The reversal of 61255307905 is 50970355216.

It is not a de Polignac number, because 61255307905 - 2¹³ = 61255299713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3407394 + ... + 3425323.

It is an arithmetic number, because the mean of its divisors is an integer number (5042545884).

Almost surely, 2^61255307905 is an apocalyptic number.

It is an amenable number.

61255307905 is a deficient number, since it is larger than the sum of its proper divisors (19425426239).

61255307905 is a wasteful number, since it uses less digits than its factorization.

61255307905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832896.

The product of its (nonzero) digits is 283500, while the sum is 43.

The spelling of 61255307905 in words is "sixty-one billion, two hundred fifty-five million, three hundred seven thousand, nine hundred five".