53981423642 has 8 divisors (see below), whose sum is σ = 81212409876. Its totient is φ = 26910620352.

The previous prime is 53981423627. The next prime is 53981423653. The reversal of 53981423642 is 24632418935.

It can be written as a sum of positive squares in 2 ways, for example, as 51117140281 + 2864283361 = 226091^2 + 53519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40044893 + ... + 40046240.

Almost surely, 2^53981423642 is an apocalyptic number.

53981423642 is a deficient number, since it is larger than the sum of its proper divisors (27230986234).

53981423642 is a wasteful number, since it uses less digits than its factorization.

53981423642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80091472.

The product of its digits is 1244160, while the sum is 47.

The spelling of 53981423642 in words is "fifty-three billion, nine hundred eighty-one million, four hundred twenty-three thousand, six hundred forty-two".