27777765454 has 4 divisors (see below), whose sum is σ = 41666648184. Its totient is φ = 13888882726.

The previous prime is 27777765409. The next prime is 27777765461. The reversal of 27777765454 is 45456777772.

It is a happy number.

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

It is a super-2 number, since 2×27777765454² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27777765392 and 27777765401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944441362 + ... + 6944441365.

It is an arithmetic number, because the mean of its divisors is an integer number (10416662046).

Almost surely, 2^27777765454 is an apocalyptic number.

27777765454 is a deficient number, since it is larger than the sum of its proper divisors (13888882730).

27777765454 is a wasteful number, since it uses less digits than its factorization.

27777765454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13888882729.

The product of its digits is 80673600, while the sum is 61.

The spelling of 27777765454 in words is "twenty-seven billion, seven hundred seventy-seven million, seven hundred sixty-five thousand, four hundred fifty-four".