68036779397 has 4 divisors (see below), whose sum is σ = 69484370496. Its totient is φ = 66589188300.

The previous prime is 68036779367. The next prime is 68036779399. The reversal of 68036779397 is 79397763086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68036779397 - 2⁶ = 68036779333 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 (68036779399) 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, 723795479 + ... + 723795572.

It is an arithmetic number, because the mean of its divisors is an integer number (17371092624).

Almost surely, 2^68036779397 is an apocalyptic number.

It is an amenable number.

68036779397 is a deficient number, since it is larger than the sum of its proper divisors (1447591099).

68036779397 is a wasteful number, since it uses less digits than its factorization.

68036779397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447591098.

The product of its (nonzero) digits is 72013536, while the sum is 65.

The spelling of 68036779397 in words is "sixty-eight billion, thirty-six million, seven hundred seventy-nine thousand, three hundred ninety-seven".