27979275015 has 64 divisors (see below), whose sum is σ = 50026078080. Its totient is φ = 14837022720.

The previous prime is 27979275011. The next prime is 27979275061. The reversal of 27979275015 is 51057297972.

It is a happy number.

27979275015 is a `hidden beast` number, since 27 + 97 + 9 + 27 + 501 + 5 = 666.

It is not a de Polignac number, because 27979275015 - 2² = 27979275011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27979275011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27084939 + ... + 27085971.

It is an arithmetic number, because the mean of its divisors is an integer number (781657470).

Almost surely, 2^27979275015 is an apocalyptic number.

27979275015 is a deficient number, since it is larger than the sum of its proper divisors (22046803065).

27979275015 is a wasteful number, since it uses less digits than its factorization.

27979275015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 2778300, while the sum is 54.

The spelling of 27979275015 in words is "twenty-seven billion, nine hundred seventy-nine million, two hundred seventy-five thousand, fifteen".