122402634642 has 18 divisors (see below), whose sum is σ = 265208924487. Its totient is φ = 40800383436.

The previous prime is 122402634637. The next prime is 122402634661. The reversal of 122402634642 is 246436204221.

122402634642 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 0 + 2 + 6 + 3 + 4 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61201317321 + 61201317321 = 247389^2 + 247389^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=247389.

It is a junction number, because it is equal to n+sod(n) for n = 122402634597 and 122402634606.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1443103 + ... + 1525565.

Almost surely, 2^122402634642 is an apocalyptic number.

122402634642 is an abundant number, since it is smaller than the sum of its proper divisors (142806289845).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122402634642 is an frugal number, since it uses more digits than its factorization.

122402634642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164934 (or 82468 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 122402634642 its reverse (246436204221), we get a palindrome (368838838863).

The spelling of 122402634642 in words is "one hundred twenty-two billion, four hundred two million, six hundred thirty-four thousand, six hundred forty-two".