1223612642523 has 16 divisors (see below), whose sum is σ = 1663126590240. Its totient is φ = 799936161024.

The previous prime is 1223612642503. The next prime is 1223612642561. The reversal of 1223612642523 is 3252462163221.

It is a de Polignac number, because none of the positive numbers 2^k-1223612642523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223612642503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1683258 + ... + 2297951.

It is an arithmetic number, because the mean of its divisors is an integer number (103945411890).

Almost surely, 2^{1223612642523} is an apocalyptic number.

1223612642523 is a deficient number, since it is larger than the sum of its proper divisors (439513947717).

1223612642523 is a wasteful number, since it uses less digits than its factorization.

1223612642523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983198.

The product of its digits is 207360, while the sum is 39.

The spelling of 1223612642523 in words is "one trillion, two hundred twenty-three billion, six hundred twelve million, six hundred forty-two thousand, five hundred twenty-three".