28723766556103 has 8 divisors (see below), whose sum is σ = 29650413393536. Its totient is φ = 27797124326400.

The previous prime is 28723766556083. The next prime is 28723766556119. The reversal of 28723766556103 is 30165566732782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28723766556103 - 2²¹ = 28723764458951 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 (28723766556143) 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, 15202663 + ... + 16987303.

It is an arithmetic number, because the mean of its divisors is an integer number (3706301674192).

Almost surely, 2^{28723766556103} is an apocalyptic number.

28723766556103 is a deficient number, since it is larger than the sum of its proper divisors (926646837433).

28723766556103 is a wasteful number, since it uses less digits than its factorization.

28723766556103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303865.

The product of its (nonzero) digits is 76204800, while the sum is 61.

The spelling of 28723766556103 in words is "twenty-eight trillion, seven hundred twenty-three billion, seven hundred sixty-six million, five hundred fifty-six thousand, one hundred three".