27678720973 has 8 divisors (see below), whose sum is σ = 28883822400. Its totient is φ = 26473759488.

The previous prime is 27678720961. The next prime is 27678721001. The reversal of 27678720973 is 37902787672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27678720973 - 2⁵ = 27678720941 is a prime.

It is a super-2 number, since 2×27678720973² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27678720073) 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, 682458 + ... + 721876.

It is an arithmetic number, because the mean of its divisors is an integer number (3610477800).

Almost surely, 2^27678720973 is an apocalyptic number.

27678720973 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27678720973 is a deficient number, since it is larger than the sum of its proper divisors (1205101427).

27678720973 is a wasteful number, since it uses less digits than its factorization.

27678720973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69971.

The product of its (nonzero) digits is 12446784, while the sum is 58.

The spelling of 27678720973 in words is "twenty-seven billion, six hundred seventy-eight million, seven hundred twenty thousand, nine hundred seventy-three".