122635420263 has 6 divisors (see below), whose sum is σ = 177140051504. Its totient is φ = 81756946836.

The previous prime is 122635420241. The next prime is 122635420279. The reversal of 122635420263 is 362024536221.

122635420263 is a `hidden beast` number, since 1 + 2 + 26 + 354 + 20 + 263 = 666.

It is not a de Polignac number, because 122635420263 - 2²⁶ = 122568311399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122635420283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6813078895 + ... + 6813078912.

Almost surely, 2^122635420263 is an apocalyptic number.

122635420263 is a deficient number, since it is larger than the sum of its proper divisors (54504631241).

122635420263 is a wasteful number, since it uses less digits than its factorization.

122635420263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13626157813 (or 13626157810 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 122635420263 its reverse (362024536221), we get a palindrome (484659956484).

The spelling of 122635420263 in words is "one hundred twenty-two billion, six hundred thirty-five million, four hundred twenty thousand, two hundred sixty-three".