27679297919851 has 2 divisors, whose sum is σ = 27679297919852. Its totient is φ = 27679297919850.

The previous prime is 27679297919827. The next prime is 27679297919951. The reversal of 27679297919851 is 15891979297672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27679297919851 - 2²⁷ = 27679163702123 is a prime.

It is a super-2 number, since 2×27679297919851² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27679297919821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13839648959925 + 13839648959926.

It is an arithmetic number, because the mean of its divisors is an integer number (13839648959926).

Almost surely, 2^{27679297919851} is an apocalyptic number.

27679297919851 is a deficient number, since it is larger than the sum of its proper divisors (1).

27679297919851 is an equidigital number, since it uses as much as digits as its factorization.

27679297919851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160406080, while the sum is 82.

The spelling of 27679297919851 in words is "twenty-seven trillion, six hundred seventy-nine billion, two hundred ninety-seven million, nine hundred nineteen thousand, eight hundred fifty-one".