68977295869 has 2 divisors, whose sum is σ = 68977295870. Its totient is φ = 68977295868.

The previous prime is 68977295819. The next prime is 68977295887. The reversal of 68977295869 is 96859277986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47846312644 + 21130983225 = 218738^2 + 145365^2 .

It is a cyclic number.

It is not a de Polignac number, because 68977295869 - 2⁷ = 68977295741 is a prime.

It is a super-2 number, since 2×68977295869² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68977295795 and 68977295804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68977295809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34488647934 + 34488647935.

It is an arithmetic number, because the mean of its divisors is an integer number (34488647935).

Almost surely, 2^68977295869 is an apocalyptic number.

It is an amenable number.

68977295869 is a deficient number, since it is larger than the sum of its proper divisors (1).

68977295869 is an equidigital number, since it uses as much as digits as its factorization.

68977295869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 823011840, while the sum is 76.

The spelling of 68977295869 in words is "sixty-eight billion, nine hundred seventy-seven million, two hundred ninety-five thousand, eight hundred sixty-nine".