27901656664 has 16 divisors (see below), whose sum is σ = 59789264400. Its totient is φ = 11957852832.

The previous prime is 27901656641. The next prime is 27901656689. The reversal of 27901656664 is 46665610972.

It is a happy number.

It is a congruent number.

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, 249121879 + ... + 249121990.

It is an arithmetic number, because the mean of its divisors is an integer number (3736829025).

Almost surely, 2^27901656664 is an apocalyptic number.

It is an amenable number.

27901656664 is an abundant number, since it is smaller than the sum of its proper divisors (31887607736).

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

27901656664 is a wasteful number, since it uses less digits than its factorization.

27901656664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498243882 (or 498243878 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 27901656664 in words is "twenty-seven billion, nine hundred one million, six hundred fifty-six thousand, six hundred sixty-four".