61146636205 has 8 divisors (see below), whose sum is σ = 73539387000. Its totient is φ = 48808359936.

The previous prime is 61146636191. The next prime is 61146636217. The reversal of 61146636205 is 50263664116.

It can be written as a sum of positive squares in 4 ways, for example, as 3744705636 + 57401930569 = 61194^2 + 239587^2 .

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 61146636205 - 2⁷ = 61146636077 is a prime.

It is a super-2 number, since 2×61146636205² (a number of 22 digits) contains 22 as substring.

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, 13616160 + ... + 13620649.

It is an arithmetic number, because the mean of its divisors is an integer number (9192423375).

Almost surely, 2^61146636205 is an apocalyptic number.

It is an amenable number.

61146636205 is a deficient number, since it is larger than the sum of its proper divisors (12392750795).

61146636205 is a wasteful number, since it uses less digits than its factorization.

61146636205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27237263.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 61146636205 in words is "sixty-one billion, one hundred forty-six million, six hundred thirty-six thousand, two hundred five".