1604551770623 has 4 divisors (see below), whose sum is σ = 1627151091408. Its totient is φ = 1581952449840.

The previous prime is 1604551770589. The next prime is 1604551770637. The reversal of 1604551770623 is 3260771554061.

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 1604551770623 - 2¹⁶ = 1604551705087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604551770643) 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, 11299660286 + ... + 11299660427.

It is an arithmetic number, because the mean of its divisors is an integer number (406787772852).

Almost surely, 2^{1604551770623} is an apocalyptic number.

1604551770623 is a deficient number, since it is larger than the sum of its proper divisors (22599320785).

1604551770623 is an equidigital number, since it uses as much as digits as its factorization.

1604551770623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22599320784.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 1604551770623 in words is "one trillion, six hundred four billion, five hundred fifty-one million, seven hundred seventy thousand, six hundred twenty-three".