27905898623 has 2 divisors, whose sum is σ = 27905898624. Its totient is φ = 27905898622.

The previous prime is 27905898611. The next prime is 27905898661. The reversal of 27905898623 is 32689850972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27905898623 - 2⁴ = 27905898607 is a prime.

It is a super-2 number, since 2×27905898623² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27905898673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13952949311 + 13952949312.

It is an arithmetic number, because the mean of its divisors is an integer number (13952949312).

Almost surely, 2^27905898623 is an apocalyptic number.

27905898623 is a deficient number, since it is larger than the sum of its proper divisors (1).

27905898623 is an equidigital number, since it uses as much as digits as its factorization.

27905898623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 27905898623 in words is "twenty-seven billion, nine hundred five million, eight hundred ninety-eight thousand, six hundred twenty-three".