53978622889 has 3 divisors (see below), whose sum is σ = 53978855223. Its totient is φ = 53978390556.

The previous prime is 53978622871. The next prime is 53978622917. The reversal of 53978622889 is 98822687935.

The square root of 53978622889 is 232333.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 53970259225 + 8363664 = 232315^2 + 2892^2 .

It is not a de Polignac number, because 53978622889 - 2¹⁵ = 53978590121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53978622289) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 116167 + ... + 348499.

It is an arithmetic number, because the mean of its divisors is an integer number (17992951741).

Almost surely, 2^53978622889 is an apocalyptic number.

53978622889 is the 232333-rd square number.

53978622889 is the 116167-th centered octagonal number.

It is an amenable number.

53978622889 is a deficient number, since it is larger than the sum of its proper divisors (232334).

53978622889 is an frugal number, since it uses more digits than its factorization.

53978622889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464666 (or 232333 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 67.

The spelling of 53978622889 in words is "fifty-three billion, nine hundred seventy-eight million, six hundred twenty-two thousand, eight hundred eighty-nine".