28177673373461 has 2 divisors, whose sum is σ = 28177673373462. Its totient is φ = 28177673373460.

The previous prime is 28177673373457. The next prime is 28177673373481. The reversal of 28177673373461 is 16437337677182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22240137243025 + 5937536130436 = 4715945^2 + 2436706^2 .

It is a cyclic number.

It is not a de Polignac number, because 28177673373461 - 2² = 28177673373457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28177673373401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14088836686730 + 14088836686731.

It is an arithmetic number, because the mean of its divisors is an integer number (14088836686731).

Almost surely, 2^{28177673373461} is an apocalyptic number.

It is an amenable number.

28177673373461 is a deficient number, since it is larger than the sum of its proper divisors (1).

28177673373461 is an equidigital number, since it uses as much as digits as its factorization.

28177673373461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 149361408, while the sum is 65.

The spelling of 28177673373461 in words is "twenty-eight trillion, one hundred seventy-seven billion, six hundred seventy-three million, three hundred seventy-three thousand, four hundred sixty-one".