123895657345 has 4 divisors (see below), whose sum is σ = 148674788820. Its totient is φ = 99116525872.

The previous prime is 123895657279. The next prime is 123895657393. The reversal of 123895657345 is 543756598321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66213067761 + 57682589584 = 257319^2 + 240172^2 .

It is a cyclic number.

It is not a de Polignac number, because 123895657345 - 2¹⁵ = 123895624577 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 123895657345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12389565730 + ... + 12389565739.

It is an arithmetic number, because the mean of its divisors is an integer number (37168697205).

Almost surely, 2^123895657345 is an apocalyptic number.

It is an amenable number.

123895657345 is a deficient number, since it is larger than the sum of its proper divisors (24779131475).

123895657345 is an equidigital number, since it uses as much as digits as its factorization.

123895657345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24779131474.

The product of its digits is 27216000, while the sum is 58.

The spelling of 123895657345 in words is "one hundred twenty-three billion, eight hundred ninety-five million, six hundred fifty-seven thousand, three hundred forty-five".