1538344965 has 32 divisors (see below), whose sum is σ = 2483675136. Its totient is φ = 813038400.

The previous prime is 1538344963. The next prime is 1538344979. The reversal of 1538344965 is 5694438351.

It is not a de Polignac number, because 1538344965 - 2¹ = 1538344963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538344963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1782124 + ... + 1782986.

It is an arithmetic number, because the mean of its divisors is an integer number (77614848).

Almost surely, 2^1538344965 is an apocalyptic number.

1538344965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1538344965 is a deficient number, since it is larger than the sum of its proper divisors (945330171).

1538344965 is a wasteful number, since it uses less digits than its factorization.

1538344965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809.

The product of its digits is 1555200, while the sum is 48.

The square root of 1538344965 is about 39221.7409735978. The cubic root of 1538344965 is about 1154.3865147778.

The spelling of 1538344965 in words is "one billion, five hundred thirty-eight million, three hundred forty-four thousand, nine hundred sixty-five".