27661153790 has 16 divisors (see below), whose sum is σ = 50095540368. Its totient is φ = 10996580736.

The previous prime is 27661153783. The next prime is 27661153811. The reversal of 27661153790 is 9735116672.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8483387 + ... + 8486646.

It is an arithmetic number, because the mean of its divisors is an integer number (3130971273).

Almost surely, 2^27661153790 is an apocalyptic number.

27661153790 is a deficient number, since it is larger than the sum of its proper divisors (22434386578).

27661153790 is a wasteful number, since it uses less digits than its factorization.

27661153790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16970203.

The product of its (nonzero) digits is 476280, while the sum is 47.

The spelling of 27661153790 in words is "twenty-seven billion, six hundred sixty-one million, one hundred fifty-three thousand, seven hundred ninety".