27742156019 has 4 divisors (see below), whose sum is σ = 27882979344. Its totient is φ = 27601332696.

The previous prime is 27742156009. The next prime is 27742156069. The reversal of 27742156019 is 91065124772.

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

It is a cyclic number.

It is not a de Polignac number, because 27742156019 - 2²⁸ = 27473720563 is a prime.

It is a super-2 number, since 2×27742156019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27742156009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70411367 + ... + 70411760.

It is an arithmetic number, because the mean of its divisors is an integer number (6970744836).

Almost surely, 2^27742156019 is an apocalyptic number.

27742156019 is a deficient number, since it is larger than the sum of its proper divisors (140823325).

27742156019 is a wasteful number, since it uses less digits than its factorization.

27742156019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140823324.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 27742156019 in words is "twenty-seven billion, seven hundred forty-two million, one hundred fifty-six thousand, nineteen".