69775426949 has 2 divisors, whose sum is σ = 69775426950. Its totient is φ = 69775426948.

The previous prime is 69775426907. The next prime is 69775426951. The reversal of 69775426949 is 94962457796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69106945924 + 668481025 = 262882^2 + 25855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69775426949 is a prime.

It is a super-2 number, since 2×69775426949² (a number of 22 digits) contains 22 as substring.

Together with 69775426951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69775426979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34887713474 + 34887713475.

It is an arithmetic number, because the mean of its divisors is an integer number (34887713475).

Almost surely, 2^69775426949 is an apocalyptic number.

It is an amenable number.

69775426949 is a deficient number, since it is larger than the sum of its proper divisors (1).

69775426949 is an equidigital number, since it uses as much as digits as its factorization.

69775426949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 205752960, while the sum is 68.

The spelling of 69775426949 in words is "sixty-nine billion, seven hundred seventy-five million, four hundred twenty-six thousand, nine hundred forty-nine".