1538264965 has 8 divisors (see below), whose sum is σ = 1856589048. Its totient is φ = 1223497920.

The previous prime is 1538264939. The next prime is 1538264969. The reversal of 1538264965 is 5694628351.

It can be written as a sum of positive squares in 4 ways, for example, as 901560676 + 636704289 = 30026^2 + 25233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1538264965 - 2²⁵ = 1504710533 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 (1538264969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888306 + ... + 890035.

It is an arithmetic number, because the mean of its divisors is an integer number (232073631).

Almost surely, 2^1538264965 is an apocalyptic number.

It is an amenable number.

1538264965 is a deficient number, since it is larger than the sum of its proper divisors (318324083).

1538264965 is a wasteful number, since it uses less digits than its factorization.

1538264965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778519.

The product of its digits is 1555200, while the sum is 49.

The square root of 1538264965 is about 39220.7211177969. The cubic root of 1538264965 is about 1154.3665035483.

The spelling of 1538264965 in words is "one billion, five hundred thirty-eight million, two hundred sixty-four thousand, nine hundred sixty-five".