345523219957 has 2 divisors, whose sum is σ = 345523219958. Its totient is φ = 345523219956.

The previous prime is 345523219949. The next prime is 345523220047. The reversal of 345523219957 is 759912325543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334609030116 + 10914189841 = 578454^2 + 104471^2 .

It is a cyclic number.

It is not a de Polignac number, because 345523219957 - 2³ = 345523219949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345523219898 and 345523219907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345523219357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172761609978 + 172761609979.

It is an arithmetic number, because the mean of its divisors is an integer number (172761609979).

Almost surely, 2^345523219957 is an apocalyptic number.

It is an amenable number.

345523219957 is a deficient number, since it is larger than the sum of its proper divisors (1).

345523219957 is an equidigital number, since it uses as much as digits as its factorization.

345523219957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206000, while the sum is 55.

The spelling of 345523219957 in words is "three hundred forty-five billion, five hundred twenty-three million, two hundred nineteen thousand, nine hundred fifty-seven".