61017668704231 has 2 divisors, whose sum is σ = 61017668704232. Its totient is φ = 61017668704230.

The previous prime is 61017668704189. The next prime is 61017668704249. The reversal of 61017668704231 is 13240786671016.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61017668704231 - 2⁴¹ = 58818645448679 is a prime.

It is a super-2 number, since 2×61017668704231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61017668704261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30508834352115 + 30508834352116.

It is an arithmetic number, because the mean of its divisors is an integer number (30508834352116).

Almost surely, 2^{61017668704231} is an apocalyptic number.

61017668704231 is a deficient number, since it is larger than the sum of its proper divisors (1).

61017668704231 is an equidigital number, since it uses as much as digits as its factorization.

61017668704231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 61017668704231 in words is "sixty-one trillion, seventeen billion, six hundred sixty-eight million, seven hundred four thousand, two hundred thirty-one".