27896859991 has 128 divisors (see below), whose sum is σ = 40673525760. Its totient is φ = 18419788800.

The previous prime is 27896859989. The next prime is 27896860007. The reversal of 27896859991 is 19995869872.

It is not a de Polignac number, because 27896859991 - 2¹ = 27896859989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27896859941) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 98575336 + ... + 98575618.

It is an arithmetic number, because the mean of its divisors is an integer number (317761920).

Almost surely, 2^27896859991 is an apocalyptic number.

27896859991 is a deficient number, since it is larger than the sum of its proper divisors (12776665769).

27896859991 is a wasteful number, since it uses less digits than its factorization.

27896859991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its digits is 176359680, while the sum is 73.

The spelling of 27896859991 in words is "twenty-seven billion, eight hundred ninety-six million, eight hundred fifty-nine thousand, nine hundred ninety-one".