194731653553 has 2 divisors, whose sum is σ = 194731653554. Its totient is φ = 194731653552.

The previous prime is 194731653541. The next prime is 194731653569. The reversal of 194731653553 is 355356137491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183369799089 + 11361854464 = 428217^2 + 106592^2 .

It is a cyclic number.

It is not a de Polignac number, because 194731653553 - 2⁵ = 194731653521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194731653553.

It is not a weakly prime, because it can be changed into another prime (194731653503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97365826776 + 97365826777.

It is an arithmetic number, because the mean of its divisors is an integer number (97365826777).

Almost surely, 2^194731653553 is an apocalyptic number.

It is an amenable number.

194731653553 is a deficient number, since it is larger than the sum of its proper divisors (1).

194731653553 is an equidigital number, since it uses as much as digits as its factorization.

194731653553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5103000, while the sum is 52.

The spelling of 194731653553 in words is "one hundred ninety-four billion, seven hundred thirty-one million, six hundred fifty-three thousand, five hundred fifty-three".