1965139455 has 16 divisors (see below), whose sum is σ = 3157958880. Its totient is φ = 1043495808.

The previous prime is 1965139417. The next prime is 1965139469. The reversal of 1965139455 is 5549315691.

It is not a de Polignac number, because 1965139455 - 2⁹ = 1965138943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282612 + ... + 289481.

It is an arithmetic number, because the mean of its divisors is an integer number (197372430).

Almost surely, 2^1965139455 is an apocalyptic number.

1965139455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1965139455 is a deficient number, since it is larger than the sum of its proper divisors (1192819425).

1965139455 is a wasteful number, since it uses less digits than its factorization.

1965139455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572330.

The product of its digits is 729000, while the sum is 48.

The square root of 1965139455 is about 44329.8934693058. The cubic root of 1965139455 is about 1252.5578461019.

The spelling of 1965139455 in words is "one billion, nine hundred sixty-five million, one hundred thirty-nine thousand, four hundred fifty-five".