27869779451 has 2 divisors, whose sum is σ = 27869779452. Its totient is φ = 27869779450.

The previous prime is 27869779423. The next prime is 27869779499. The reversal of 27869779451 is 15497796872.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27869779451 is a prime.

It is a super-2 number, since 2×27869779451² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27869779411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13934889725 + 13934889726.

It is an arithmetic number, because the mean of its divisors is an integer number (13934889726).

Almost surely, 2^27869779451 is an apocalyptic number.

27869779451 is a deficient number, since it is larger than the sum of its proper divisors (1).

27869779451 is an equidigital number, since it uses as much as digits as its factorization.

27869779451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53343360, while the sum is 65.

The spelling of 27869779451 in words is "twenty-seven billion, eight hundred sixty-nine million, seven hundred seventy-nine thousand, four hundred fifty-one".