28581049546 has 16 divisors (see below), whose sum is σ = 49429681344. Its totient is φ = 12140622144.

The previous prime is 28581049513. The next prime is 28581049547. The reversal of 28581049546 is 64594018582.

It is a super-2 number, since 2×28581049546² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28581049493 and 28581049502.

It is not an unprimeable number, because it can be changed into a prime (28581049547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9031620 + ... + 9034783.

It is an arithmetic number, because the mean of its divisors is an integer number (3089355084).

Almost surely, 2^28581049546 is an apocalyptic number.

28581049546 is a deficient number, since it is larger than the sum of its proper divisors (20848631798).

28581049546 is a wasteful number, since it uses less digits than its factorization.

28581049546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18066525.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 28581049546 in words is "twenty-eight billion, five hundred eighty-one million, forty-nine thousand, five hundred forty-six".