53981423643 has 18 divisors (see below), whose sum is σ = 83730659124. Its totient is φ = 30844918104.

The previous prime is 53981423627. The next prime is 53981423653. The reversal of 53981423643 is 34632418935.

It is not a de Polignac number, because 53981423643 - 2⁴ = 53981423627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53981423592 and 53981423601.

It is not an unprimeable number, because it can be changed into a prime (53981423623) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2807380 + ... + 2826542.

Almost surely, 2^53981423643 is an apocalyptic number.

53981423643 is a deficient number, since it is larger than the sum of its proper divisors (29749235481).

53981423643 is an frugal number, since it uses more digits than its factorization.

53981423643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38343 (or 19173 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

Multiplying 53981423643 by its sum of digits (48), we get a square (2591108334864 = 1609692²).

The spelling of 53981423643 in words is "fifty-three billion, nine hundred eighty-one million, four hundred twenty-three thousand, six hundred forty-three".