19961075626677 has 6 divisors (see below), whose sum is σ = 28832664794102. Its totient is φ = 13307383751112.

The previous prime is 19961075626673. The next prime is 19961075626693. The reversal of 19961075626677 is 77662657016991.

19961075626677 is a `hidden beast` number, since 199 + 6 + 107 + 5 + 6 + 266 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16435126808676 + 3525948818001 = 4054026^2 + 1877751^2 .

It is not a de Polignac number, because 19961075626677 - 2² = 19961075626673 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 (19961075626673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1108948645918 + ... + 1108948645935.

Almost surely, 2^{19961075626677} is an apocalyptic number.

It is an amenable number.

19961075626677 is a deficient number, since it is larger than the sum of its proper divisors (8871589167425).

19961075626677 is a wasteful number, since it uses less digits than its factorization.

19961075626677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217897291859 (or 2217897291856 counting only the distinct ones).

The product of its (nonzero) digits is 360067680, while the sum is 72.

The spelling of 19961075626677 in words is "nineteen trillion, nine hundred sixty-one billion, seventy-five million, six hundred twenty-six thousand, six hundred seventy-seven".