27981454098 has 16 divisors (see below), whose sum is σ = 60267747456. Its totient is φ = 8609678160.

The previous prime is 27981454097. The next prime is 27981454117. The reversal of 27981454098 is 89045418972.

It is not an unprimeable number, because it can be changed into a prime (27981454097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179368218 + ... + 179368373.

It is an arithmetic number, because the mean of its divisors is an integer number (3766734216).

Almost surely, 2^27981454098 is an apocalyptic number.

27981454098 is an abundant number, since it is smaller than the sum of its proper divisors (32286293358).

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

27981454098 is a wasteful number, since it uses less digits than its factorization.

27981454098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358736609.

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 27981454098 in words is "twenty-seven billion, nine hundred eighty-one million, four hundred fifty-four thousand, ninety-eight".