28261954470009 has 128 divisors (see below), whose sum is σ = 41758526537728. Its totient is φ = 16897138513920.

The previous prime is 28261954470007. The next prime is 28261954470049. The reversal of 28261954470009 is 90007445916282.

It is not a de Polignac number, because 28261954470009 - 2¹ = 28261954470007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28261954470007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 49495541694 + ... + 49495542264.

It is an arithmetic number, because the mean of its divisors is an integer number (326238488576).

Almost surely, 2^{28261954470009} is an apocalyptic number.

It is an amenable number.

28261954470009 is a deficient number, since it is larger than the sum of its proper divisors (13496572067719).

28261954470009 is a wasteful number, since it uses less digits than its factorization.

28261954470009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 28261954470009 in words is "twenty-eight trillion, two hundred sixty-one billion, nine hundred fifty-four million, four hundred seventy thousand, nine".