28505786750901 has 48 divisors (see below), whose sum is σ = 43836857745408. Its totient is φ = 18502139329200.

The previous prime is 28505786750887. The next prime is 28505786750923. The reversal of 28505786750901 is 10905768750582.

28505786750901 is a `hidden beast` number, since 2 + 8 + 5 + 0 + 578 + 6 + 7 + 50 + 9 + 0 + 1 = 666.

It is not a de Polignac number, because 28505786750901 - 2⁵ = 28505786750869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28505786752901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4352385 + ... + 8715206.

It is an arithmetic number, because the mean of its divisors is an integer number (913267869696).

Almost surely, 2^{28505786750901} is an apocalyptic number.

It is an amenable number.

28505786750901 is a deficient number, since it is larger than the sum of its proper divisors (15331070994507).

28505786750901 is a wasteful number, since it uses less digits than its factorization.

28505786750901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13067844 (or 13067832 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 63.

The spelling of 28505786750901 in words is "twenty-eight trillion, five hundred five billion, seven hundred eighty-six million, seven hundred fifty thousand, nine hundred one".