28251378506363 has 4 divisors (see below), whose sum is σ = 28251413666328. Its totient is φ = 28251343346400.

The previous prime is 28251378506359. The next prime is 28251378506411. The reversal of 28251378506363 is 36360587315282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28251378506363 - 2² = 28251378506359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28251378506303) 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, 16345838 + ... + 17991363.

It is an arithmetic number, because the mean of its divisors is an integer number (7062853416582).

Almost surely, 2^{28251378506363} is an apocalyptic number.

28251378506363 is a deficient number, since it is larger than the sum of its proper divisors (35159965).

28251378506363 is an equidigital number, since it uses as much as digits as its factorization.

28251378506363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35159964.

The product of its (nonzero) digits is 43545600, while the sum is 59.

The spelling of 28251378506363 in words is "twenty-eight trillion, two hundred fifty-one billion, three hundred seventy-eight million, five hundred six thousand, three hundred sixty-three".