345262261381 has 2 divisors, whose sum is σ = 345262261382. Its totient is φ = 345262261380.

The previous prime is 345262261361. The next prime is 345262261403. The reversal of 345262261381 is 183162262543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314226392481 + 31035868900 = 560559^2 + 176170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345262261381 is a prime.

It is a super-2 number, since 2×345262261381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345262261301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172631130690 + 172631130691.

It is an arithmetic number, because the mean of its divisors is an integer number (172631130691).

Almost surely, 2^345262261381 is an apocalyptic number.

It is an amenable number.

345262261381 is a deficient number, since it is larger than the sum of its proper divisors (1).

345262261381 is an equidigital number, since it uses as much as digits as its factorization.

345262261381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The spelling of 345262261381 in words is "three hundred forty-five billion, two hundred sixty-two million, two hundred sixty-one thousand, three hundred eighty-one".