53666516442 has 64 divisors (see below), whose sum is σ = 133935197184. Its totient is φ = 13927127040.

The previous prime is 53666516411. The next prime is 53666516509. The reversal of 53666516442 is 24461566635.

It is a junction number, because it is equal to n+sod(n) for n = 53666516391 and 53666516400.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482313 + ... + 583059.

It is an arithmetic number, because the mean of its divisors is an integer number (2092737456).

Almost surely, 2^53666516442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53666516442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66967598592).

53666516442 is an abundant number, since it is smaller than the sum of its proper divisors (80268680742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53666516442 is a wasteful number, since it uses less digits than its factorization.

53666516442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101923.

The product of its digits is 3110400, while the sum is 48.

The spelling of 53666516442 in words is "fifty-three billion, six hundred sixty-six million, five hundred sixteen thousand, four hundred forty-two".