1603156816 has 40 divisors (see below), whose sum is σ = 3223119104. Its totient is φ = 771655680.

The previous prime is 1603156813. The next prime is 1603156837. The reversal of 1603156816 is 6186513061.

It is a super-2 number, since 2×1603156816² = 5140223553374515712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603156811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87355 + ... + 104101.

Almost surely, 2^1603156816 is an apocalyptic number.

1603156816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1603156816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611559552).

1603156816 is an abundant number, since it is smaller than the sum of its proper divisors (1619962288).

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

1603156816 is a wasteful number, since it uses less digits than its factorization.

1603156816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16979 (or 16973 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1603156816 is about 40039.4407553352. The cubic root of 1603156816 is about 1170.3758054473.

Adding to 1603156816 its reverse (6186513061), we get a palindrome (7789669877).

The spelling of 1603156816 in words is "one billion, six hundred three million, one hundred fifty-six thousand, eight hundred sixteen".