1603791648 has 36 divisors (see below), whose sum is σ = 4560783318. Its totient is φ = 534597120.

The previous prime is 1603791647. The next prime is 1603791661. The reversal of 1603791648 is 8461973061.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 980190864 + 623600784 = 31308^2 + 24972^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1603791641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2784073 + ... + 2784648.

Almost surely, 2^1603791648 is an apocalyptic number.

1603791648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1603791648 is an abundant number, since it is smaller than the sum of its proper divisors (2956991670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1603791648 is a wasteful number, since it uses less digits than its factorization.

1603791648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5568737 (or 5568726 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1603791648 is about 40047.3675539354. The cubic root of 1603791648 is about 1170.5302702623.

The spelling of 1603791648 in words is "one billion, six hundred three million, seven hundred ninety-one thousand, six hundred forty-eight".