53662790178818 has 6 divisors (see below), whose sum is σ = 80494200807939. Its totient is φ = 26831389909506.

The previous prime is 53662790178797. The next prime is 53662790178841. The reversal of 53662790178818 is 81887109726635.

It can be written as a sum of positive squares in only one way, i.e., 26831395089409 + 26831395089409 = 5179903^2 + 5179903^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5179903.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7769855 + ... + 12949757.

Almost surely, 2^{53662790178818} is an apocalyptic number.

53662790178818 is a deficient number, since it is larger than the sum of its proper divisors (26831410629121).

53662790178818 is an frugal number, since it uses more digits than its factorization.

53662790178818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10359808 (or 5179905 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 71.

The spelling of 53662790178818 in words is "fifty-three trillion, six hundred sixty-two billion, seven hundred ninety million, one hundred seventy-eight thousand, eight hundred eighteen".