27840385754 has 4 divisors (see below), whose sum is σ = 41760578634. Its totient is φ = 13920192876.

The previous prime is 27840385723. The next prime is 27840385829. The reversal of 27840385754 is 45758304872.

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

It can be written as a sum of positive squares in only one way, i.e., 26177622025 + 1662763729 = 161795^2 + 40777^2 .

It is a super-2 number, since 2×27840385754² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27840385696 and 27840385705.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960096437 + ... + 6960096440.

Almost surely, 2^27840385754 is an apocalyptic number.

27840385754 is a deficient number, since it is larger than the sum of its proper divisors (13920192880).

27840385754 is a wasteful number, since it uses less digits than its factorization.

27840385754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13920192879.

The product of its (nonzero) digits is 7526400, while the sum is 53.

The spelling of 27840385754 in words is "twenty-seven billion, eight hundred forty million, three hundred eighty-five thousand, seven hundred fifty-four".