194355553537 has 2 divisors, whose sum is σ = 194355553538. Its totient is φ = 194355553536.

The previous prime is 194355553493. The next prime is 194355553541. The reversal of 194355553537 is 735355553491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154750971456 + 39604582081 = 393384^2 + 199009^2 .

It is a cyclic number.

It is not a de Polignac number, because 194355553537 - 2⁷ = 194355553409 is a prime.

It is not a weakly prime, because it can be changed into another prime (194355553547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97177776768 + 97177776769.

It is an arithmetic number, because the mean of its divisors is an integer number (97177776769).

Almost surely, 2^194355553537 is an apocalyptic number.

It is an amenable number.

194355553537 is a deficient number, since it is larger than the sum of its proper divisors (1).

194355553537 is an equidigital number, since it uses as much as digits as its factorization.

194355553537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21262500, while the sum is 55.

The spelling of 194355553537 in words is "one hundred ninety-four billion, three hundred fifty-five million, five hundred fifty-three thousand, five hundred thirty-seven".