61220706305 has 32 divisors (see below), whose sum is σ = 80596805760. Its totient is φ = 44272926720.

The previous prime is 61220706247. The next prime is 61220706317. The reversal of 61220706305 is 50360702216.

It is not a de Polignac number, because 61220706305 - 2⁶ = 61220706241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8746067 + ... + 8753063.

It is an arithmetic number, because the mean of its divisors is an integer number (2518650180).

Almost surely, 2^61220706305 is an apocalyptic number.

It is an amenable number.

61220706305 is a deficient number, since it is larger than the sum of its proper divisors (19376099455).

61220706305 is a wasteful number, since it uses less digits than its factorization.

61220706305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7889.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 61220706305 in words is "sixty-one billion, two hundred twenty million, seven hundred six thousand, three hundred five".