1323025686538 has 4 divisors (see below), whose sum is σ = 1984538529810. Its totient is φ = 661512843268.

The previous prime is 1323025686527. The next prime is 1323025686539. The reversal of 1323025686538 is 8356865203231.

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

It can be written as a sum of positive squares in only one way, i.e., 1310207597449 + 12818089089 = 1144643^2 + 113217^2 .

It is not an unprimeable number, because it can be changed into a prime (1323025686539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330756421633 + ... + 330756421636.

Almost surely, 2^{1323025686538} is an apocalyptic number.

1323025686538 is a deficient number, since it is larger than the sum of its proper divisors (661512843272).

1323025686538 is an equidigital number, since it uses as much as digits as its factorization.

1323025686538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661512843271.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 1323025686538 in words is "one trillion, three hundred twenty-three billion, twenty-five million, six hundred eighty-six thousand, five hundred thirty-eight".