27896920491 has 32 divisors (see below), whose sum is σ = 44350212096. Its totient is φ = 15399360000.

The previous prime is 27896920427. The next prime is 27896920517. The reversal of 27896920491 is 19402969872.

It is not a de Polignac number, because 27896920491 - 2⁶ = 27896920427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27896920291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 784660 + ... + 819441.

It is an arithmetic number, because the mean of its divisors is an integer number (1385944128).

Almost surely, 2^27896920491 is an apocalyptic number.

27896920491 is a deficient number, since it is larger than the sum of its proper divisors (16453291605).

27896920491 is a wasteful number, since it uses less digits than its factorization.

27896920491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604163.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 27896920491 in words is "twenty-seven billion, eight hundred ninety-six million, nine hundred twenty thousand, four hundred ninety-one".