27500138739 has 8 divisors (see below), whose sum is σ = 40740946320. Its totient is φ = 18333425808.

The previous prime is 27500138711. The next prime is 27500138833. The reversal of 27500138739 is 93783100572.

It is a happy number.

27500138739 is a `hidden beast` number, since 2 + 7 + 500 + 138 + 7 + 3 + 9 = 666.

It is not a de Polignac number, because 27500138739 - 2¹⁶ = 27500073203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27500138694 and 27500138703.

It is not an unprimeable number, because it can be changed into a prime (27500136739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509261802 + ... + 509261855.

It is an arithmetic number, because the mean of its divisors is an integer number (5092618290).

Almost surely, 2^27500138739 is an apocalyptic number.

27500138739 is a deficient number, since it is larger than the sum of its proper divisors (13240807581).

27500138739 is a wasteful number, since it uses less digits than its factorization.

27500138739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018523666 (or 1018523660 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 27500138739 in words is "twenty-seven billion, five hundred million, one hundred thirty-eight thousand, seven hundred thirty-nine".