61031726117 has 8 divisors (see below), whose sum is σ = 61376547960. Its totient is φ = 60686988480.

The previous prime is 61031726101. The next prime is 61031726131. The reversal of 61031726117 is 71162713016.

61031726117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 247046²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 672572356 + 60359153761 = 25934^2 + 245681^2 .

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 61031726117 - 2⁴ = 61031726101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61031726017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1948859 + ... + 1979927.

It is an arithmetic number, because the mean of its divisors is an integer number (7672068495).

Almost surely, 2^61031726117 is an apocalyptic number.

It is an amenable number.

61031726117 is a deficient number, since it is larger than the sum of its proper divisors (344821843).

61031726117 is a wasteful number, since it uses less digits than its factorization.

61031726117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42103.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 61031726117 in words is "sixty-one billion, thirty-one million, seven hundred twenty-six thousand, one hundred seventeen".