1604499948749 has 4 divisors (see below), whose sum is σ = 1604553410460. Its totient is φ = 1604446487040.

The previous prime is 1604499948739. The next prime is 1604499948809. The reversal of 1604499948749 is 9478499944061.

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 928457509225 + 676042439524 = 963565^2 + 822218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604499948749 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 (1604499948739) 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, 26685812 + ... + 26745869.

It is an arithmetic number, because the mean of its divisors is an integer number (401138352615).

Almost surely, 2^{1604499948749} is an apocalyptic number.

It is an amenable number.

1604499948749 is a deficient number, since it is larger than the sum of its proper divisors (53461711).

1604499948749 is an equidigital number, since it uses as much as digits as its factorization.

1604499948749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53461710.

The product of its (nonzero) digits is 564350976, while the sum is 74.

The spelling of 1604499948749 in words is "one trillion, six hundred four billion, four hundred ninety-nine million, nine hundred forty-eight thousand, seven hundred forty-nine".