634205612153 has 2 divisors, whose sum is σ = 634205612154. Its totient is φ = 634205612152.

The previous prime is 634205612149. The next prime is 634205612197. The reversal of 634205612153 is 351216502436.

634205612153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390765012544 + 243440599609 = 625112^2 + 493397^2 .

It is a cyclic number.

It is not a de Polignac number, because 634205612153 - 2² = 634205612149 is a prime.

It is a super-2 number, since 2×634205612153² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634205617153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317102806076 + 317102806077.

It is an arithmetic number, because the mean of its divisors is an integer number (317102806077).

Almost surely, 2^634205612153 is an apocalyptic number.

It is an amenable number.

634205612153 is a deficient number, since it is larger than the sum of its proper divisors (1).

634205612153 is an equidigital number, since it uses as much as digits as its factorization.

634205612153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 634205612153 in words is "six hundred thirty-four billion, two hundred five million, six hundred twelve thousand, one hundred fifty-three".