68397770429 has 4 divisors (see below), whose sum is σ = 69025273020. Its totient is φ = 67770267840.

The previous prime is 68397770401. The next prime is 68397770459. The reversal of 68397770429 is 92407779386.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23432567929 + 44965202500 = 153077^2 + 212050^2 .

It is a cyclic number.

It is not a de Polignac number, because 68397770429 - 2²⁰ = 68396721853 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 (68397770459) 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 in 3 ways as a sum of consecutive naturals, for example, 313751132 + ... + 313751349.

It is an arithmetic number, because the mean of its divisors is an integer number (17256318255).

Almost surely, 2^68397770429 is an apocalyptic number.

It is an amenable number.

68397770429 is a deficient number, since it is larger than the sum of its proper divisors (627502591).

68397770429 is a wasteful number, since it uses less digits than its factorization.

68397770429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627502590.

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 68397770429 in words is "sixty-eight billion, three hundred ninety-seven million, seven hundred seventy thousand, four hundred twenty-nine".