27679297919947 has 4 divisors (see below), whose sum is σ = 29307491915256. Its totient is φ = 26051103924640.

The previous prime is 27679297919851. The next prime is 27679297919951. The reversal of 27679297919947 is 74991979297672.

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

It is not a de Polignac number, because 27679297919947 - 2¹¹ = 27679297917899 is a prime.

It is a super-2 number, since 2×27679297919947² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27679297910947) 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, 814096997629 + ... + 814096997662.

It is an arithmetic number, because the mean of its divisors is an integer number (7326872978814).

Almost surely, 2^{27679297919947} is an apocalyptic number.

27679297919947 is a deficient number, since it is larger than the sum of its proper divisors (1628193995309).

27679297919947 is a wasteful number, since it uses less digits than its factorization.

27679297919947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628193995308.

The product of its digits is 13610558304, while the sum is 88.

The spelling of 27679297919947 in words is "twenty-seven trillion, six hundred seventy-nine billion, two hundred ninety-seven million, nine hundred nineteen thousand, nine hundred forty-seven".