27977677973 has 24 divisors (see below), whose sum is σ = 33768060480. Its totient is φ = 22703820480.

The previous prime is 27977677967. The next prime is 27977678059. The reversal of 27977677973 is 37977677972.

It is not a de Polignac number, because 27977677973 - 2¹⁴ = 27977661589 is a prime.

It is a super-3 number, since 3×27977677973³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27977677897 and 27977677906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27977677913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5503793 + ... + 5508873.

It is an arithmetic number, because the mean of its divisors is an integer number (1407002520).

Almost surely, 2^27977677973 is an apocalyptic number.

It is an amenable number.

27977677973 is a deficient number, since it is larger than the sum of its proper divisors (5790382507).

27977677973 is a wasteful number, since it uses less digits than its factorization.

27977677973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7305 (or 7286 counting only the distinct ones).

The product of its digits is 343064484, while the sum is 71.

Subtracting 27977677973 from its reverse (37977677972), we obtain a palindrome (9999999999).

The spelling of 27977677973 in words is "twenty-seven billion, nine hundred seventy-seven million, six hundred seventy-seven thousand, nine hundred seventy-three".