345881172061 has 2 divisors, whose sum is σ = 345881172062. Its totient is φ = 345881172060.

The previous prime is 345881172037. The next prime is 345881172097. The reversal of 345881172061 is 160271188543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182094225625 + 163786946436 = 426725^2 + 404706^2 .

It is a cyclic number.

It is not a de Polignac number, because 345881172061 - 2⁹ = 345881171549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345881172001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172940586030 + 172940586031.

It is an arithmetic number, because the mean of its divisors is an integer number (172940586031).

Almost surely, 2^345881172061 is an apocalyptic number.

It is an amenable number.

345881172061 is a deficient number, since it is larger than the sum of its proper divisors (1).

345881172061 is an equidigital number, since it uses as much as digits as its factorization.

345881172061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 345881172061 in words is "three hundred forty-five billion, eight hundred eighty-one million, one hundred seventy-two thousand, sixty-one".