61156338305 has 16 divisors (see below), whose sum is σ = 77715915264. Its totient is φ = 46040375040.

The previous prime is 61156338263. The next prime is 61156338311. The reversal of 61156338305 is 50383365116.

61156338305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61156338305 - 2⁸ = 61156338049 is a prime.

It is a super-2 number, since 2×61156338305² (a number of 22 digits) contains 22 as substring.

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, 574064 + ... + 672206.

It is an arithmetic number, because the mean of its divisors is an integer number (4857244704).

Almost surely, 2^61156338305 is an apocalyptic number.

It is an amenable number.

61156338305 is a deficient number, since it is larger than the sum of its proper divisors (16559576959).

61156338305 is a wasteful number, since it uses less digits than its factorization.

61156338305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105496.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 61156338305 in words is "sixty-one billion, one hundred fifty-six million, three hundred thirty-eight thousand, three hundred five".