28912606901 has 4 divisors (see below), whose sum is σ = 29584993152. Its totient is φ = 28240220652.

The previous prime is 28912606897. The next prime is 28912606927. The reversal of 28912606901 is 10960621982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28912606901 - 2² = 28912606897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28912606981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336193061 + ... + 336193146.

It is an arithmetic number, because the mean of its divisors is an integer number (7396248288).

Almost surely, 2^28912606901 is an apocalyptic number.

It is an amenable number.

28912606901 is a deficient number, since it is larger than the sum of its proper divisors (672386251).

28912606901 is an equidigital number, since it uses as much as digits as its factorization.

28912606901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672386250.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 28912606901 in words is "twenty-eight billion, nine hundred twelve million, six hundred six thousand, nine hundred one".