672129625477 has 2 divisors, whose sum is σ = 672129625478. Its totient is φ = 672129625476.

The previous prime is 672129625441. The next prime is 672129625487. The reversal of 672129625477 is 774526921276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664813560321 + 7316065156 = 815361^2 + 85534^2 .

It is a cyclic number.

It is not a de Polignac number, because 672129625477 - 2³⁹ = 122373811589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672129625487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336064812738 + 336064812739.

It is an arithmetic number, because the mean of its divisors is an integer number (336064812739).

Almost surely, 2^672129625477 is an apocalyptic number.

It is an amenable number.

672129625477 is a deficient number, since it is larger than the sum of its proper divisors (1).

672129625477 is an equidigital number, since it uses as much as digits as its factorization.

672129625477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 58.

The spelling of 672129625477 in words is "six hundred seventy-two billion, one hundred twenty-nine million, six hundred twenty-five thousand, four hundred seventy-seven".