345086891761 has 2 divisors, whose sum is σ = 345086891762. Its totient is φ = 345086891760.

The previous prime is 345086891701. The next prime is 345086891777. The reversal of 345086891761 is 167198680543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317835485361 + 27251406400 = 563769^2 + 165080^2 .

It is a cyclic number.

It is not a de Polignac number, because 345086891761 - 2¹³ = 345086883569 is a prime.

It is a super-2 number, since 2×345086891761² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 345086891696 and 345086891705.

It is not a weakly prime, because it can be changed into another prime (345086891701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172543445880 + 172543445881.

It is an arithmetic number, because the mean of its divisors is an integer number (172543445881).

Almost surely, 2^345086891761 is an apocalyptic number.

It is an amenable number.

345086891761 is a deficient number, since it is larger than the sum of its proper divisors (1).

345086891761 is an equidigital number, since it uses as much as digits as its factorization.

345086891761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 345086891761 in words is "three hundred forty-five billion, eighty-six million, eight hundred ninety-one thousand, seven hundred sixty-one".