28167754777761 has 32 divisors (see below), whose sum is σ = 40253320614528. Its totient is φ = 17458105466880.

The previous prime is 28167754777717. The next prime is 28167754777769. The reversal of 28167754777761 is 16777745776182.

It is not a de Polignac number, because 28167754777761 - 2¹³ = 28167754769569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28167754777769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2887015 + ... + 8041788.

It is an arithmetic number, because the mean of its divisors is an integer number (1257916269204).

Almost surely, 2^{28167754777761} is an apocalyptic number.

It is an amenable number.

28167754777761 is a deficient number, since it is larger than the sum of its proper divisors (12085565836767).

28167754777761 is a wasteful number, since it uses less digits than its factorization.

28167754777761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10929441.

The product of its digits is 1355316480, while the sum is 75.

The spelling of 28167754777761 in words is "twenty-eight trillion, one hundred sixty-seven billion, seven hundred fifty-four million, seven hundred seventy-seven thousand, seven hundred sixty-one".