65090978389 has 4 divisors (see below), whose sum is σ = 65091496320. Its totient is φ = 65090460460.

The previous prime is 65090978363. The next prime is 65090978401. The reversal of 65090978389 is 98387909056.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65090978389 - 2⁹ = 65090977877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65090978389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65090978089) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 62874 + ... + 366244.

It is an arithmetic number, because the mean of its divisors is an integer number (16272874080).

Almost surely, 2^65090978389 is an apocalyptic number.

It is an amenable number.

65090978389 is a deficient number, since it is larger than the sum of its proper divisors (517931).

65090978389 is a wasteful number, since it uses less digits than its factorization.

65090978389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517930.

The product of its (nonzero) digits is 29393280, while the sum is 64.

The spelling of 65090978389 in words is "sixty-five billion, ninety million, nine hundred seventy-eight thousand, three hundred eighty-nine".