27909649464 has 32 divisors (see below), whose sum is σ = 70066080000. Its totient is φ = 9264288992.

The previous prime is 27909649441. The next prime is 27909649477. The reversal of 27909649464 is 46494690972.

It is a junction number, because it is equal to n+sod(n) for n = 27909649398 and 27909649407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2427114 + ... + 2438585.

It is an arithmetic number, because the mean of its divisors is an integer number (2189565000).

Almost surely, 2^27909649464 is an apocalyptic number.

27909649464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27909649464 is an abundant number, since it is smaller than the sum of its proper divisors (42156430536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27909649464 is a wasteful number, since it uses less digits than its factorization.

27909649464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4865947 (or 4865943 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 60.

The spelling of 27909649464 in words is "twenty-seven billion, nine hundred nine million, six hundred forty-nine thousand, four hundred sixty-four".