29642697251857 has 2 divisors, whose sum is σ = 29642697251858. Its totient is φ = 29642697251856.

The previous prime is 29642697251809. The next prime is 29642697252013. The reversal of 29642697251857 is 75815279624692.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23834939466816 + 5807757785041 = 4882104^2 + 2409929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29642697251857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29642697251857.

It is not a weakly prime, because it can be changed into another prime (29642697257857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14821348625928 + 14821348625929.

It is an arithmetic number, because the mean of its divisors is an integer number (14821348625929).

Almost surely, 2^{29642697251857} is an apocalyptic number.

It is an amenable number.

29642697251857 is a deficient number, since it is larger than the sum of its proper divisors (1).

29642697251857 is an equidigital number, since it uses as much as digits as its factorization.

29642697251857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 914457600, while the sum is 73.

The spelling of 29642697251857 in words is "twenty-nine trillion, six hundred forty-two billion, six hundred ninety-seven million, two hundred fifty-one thousand, eight hundred fifty-seven".