27191696512 has 32 divisors (see below), whose sum is σ = 54503336880. Its totient is φ = 13512427776.

The previous prime is 27191696507. The next prime is 27191696513. The reversal of 27191696512 is 21569619172.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×27191696512² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27191696513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630778 + ... + 672505.

Almost surely, 2^27191696512 is an apocalyptic number.

It is an amenable number.

27191696512 is an abundant number, since it is smaller than the sum of its proper divisors (27311640368).

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

27191696512 is a wasteful number, since it uses less digits than its factorization.

27191696512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303460 (or 1303448 counting only the distinct ones).

The product of its digits is 408240, while the sum is 49.

The spelling of 27191696512 in words is "twenty-seven billion, one hundred ninety-one million, six hundred ninety-six thousand, five hundred twelve".