1965253537 has 4 divisors (see below), whose sum is σ = 2116426900. Its totient is φ = 1814080176.

The previous prime is 1965253519. The next prime is 1965253571. The reversal of 1965253537 is 7353525691.

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 1103302656 + 861950881 = 33216^2 + 29359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1965253537 - 2²⁷ = 1831035809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965254537) 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, 75586662 + ... + 75586687.

It is an arithmetic number, because the mean of its divisors is an integer number (529106725).

Almost surely, 2^1965253537 is an apocalyptic number.

It is an amenable number.

1965253537 is a deficient number, since it is larger than the sum of its proper divisors (151173363).

1965253537 is a wasteful number, since it uses less digits than its factorization.

1965253537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151173362.

The product of its digits is 850500, while the sum is 46.

The square root of 1965253537 is about 44331.1801895686. The cubic root of 1965253537 is about 1252.5820838286.

The spelling of 1965253537 in words is "one billion, nine hundred sixty-five million, two hundred fifty-three thousand, five hundred thirty-seven".