27990651454 has 8 divisors (see below), whose sum is σ = 41998599360. Its totient is φ = 13991118336.

The previous prime is 27990651443. The next prime is 27990651461. The reversal of 27990651454 is 45415609972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095374 + ... + 2108689.

It is an arithmetic number, because the mean of its divisors is an integer number (5249824920).

Almost surely, 2^27990651454 is an apocalyptic number.

27990651454 is a deficient number, since it is larger than the sum of its proper divisors (14007947906).

27990651454 is a wasteful number, since it uses less digits than its factorization.

27990651454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207394.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 27990651454 in words is "twenty-seven billion, nine hundred ninety million, six hundred fifty-one thousand, four hundred fifty-four".