27801450123 has 32 divisors (see below), whose sum is σ = 43111180800. Its totient is φ = 15807407616.

The previous prime is 27801450067. The next prime is 27801450133. The reversal of 27801450123 is 32105410872.

It is not a de Polignac number, because 27801450123 - 2²⁴ = 27784672907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27801450133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 601428 + ... + 646001.

It is an arithmetic number, because the mean of its divisors is an integer number (1347224400).

Almost surely, 2^27801450123 is an apocalyptic number.

27801450123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

27801450123 is a deficient number, since it is larger than the sum of its proper divisors (15309730677).

27801450123 is a wasteful number, since it uses less digits than its factorization.

27801450123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247491.

The product of its (nonzero) digits is 13440, while the sum is 33.

Adding to 27801450123 its reverse (32105410872), we get a palindrome (59906860995).

The spelling of 27801450123 in words is "twenty-seven billion, eight hundred one million, four hundred fifty thousand, one hundred twenty-three".