1656224412603 has 4 divisors (see below), whose sum is σ = 2208299216808. Its totient is φ = 1104149608400.

The previous prime is 1656224412553. The next prime is 1656224412659. The reversal of 1656224412603 is 3062144226561.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1656224412603 - 2¹² = 1656224408507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1656224412673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276037402098 + ... + 276037402103.

It is an arithmetic number, because the mean of its divisors is an integer number (552074804202).

Almost surely, 2^{1656224412603} is an apocalyptic number.

1656224412603 is a deficient number, since it is larger than the sum of its proper divisors (552074804205).

1656224412603 is an equidigital number, since it uses as much as digits as its factorization.

1656224412603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552074804204.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 1656224412603 in words is "one trillion, six hundred fifty-six billion, two hundred twenty-four million, four hundred twelve thousand, six hundred three".