187278779543 has 12 divisors (see below), whose sum is σ = 193564576440. Its totient is φ = 181191014640.

The previous prime is 187278779539. The next prime is 187278779563. The reversal of 187278779543 is 345977872781.

It is not a de Polignac number, because 187278779543 - 2² = 187278779539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187278779563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4070021 + ... + 4115777.

It is an arithmetic number, because the mean of its divisors is an integer number (16130381370).

Almost surely, 2^187278779543 is an apocalyptic number.

187278779543 is a deficient number, since it is larger than the sum of its proper divisors (6285796897).

187278779543 is an equidigital number, since it uses as much as digits as its factorization.

187278779543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50078 (or 50047 counting only the distinct ones).

The product of its digits is 165957120, while the sum is 68.

The spelling of 187278779543 in words is "one hundred eighty-seven billion, two hundred seventy-eight million, seven hundred seventy-nine thousand, five hundred forty-three".