27761896464 has 20 divisors (see below), whose sum is σ = 71718232656. Its totient is φ = 9253965472.

The previous prime is 27761896441. The next prime is 27761896483. The reversal of 27761896464 is 46469816772.

It is a junction number, because it is equal to n+sod(n) for n = 27761896398 and 27761896407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289186374 + ... + 289186469.

Almost surely, 2^27761896464 is an apocalyptic number.

27761896464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27761896464 is an abundant number, since it is smaller than the sum of its proper divisors (43956336192).

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

27761896464 is a wasteful number, since it uses less digits than its factorization.

27761896464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578372854 (or 578372848 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 60.

The spelling of 27761896464 in words is "twenty-seven billion, seven hundred sixty-one million, eight hundred ninety-six thousand, four hundred sixty-four".