2647431878 has 48 divisors (see below), whose sum is σ = 5021596944. Its totient is φ = 1037494080.

The previous prime is 2647431841. The next prime is 2647431887. The reversal of 2647431878 is 8781347462.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126608 + ... + 146028.

It is an arithmetic number, because the mean of its divisors is an integer number (104616603).

Almost surely, 2^2647431878 is an apocalyptic number.

2647431878 is a deficient number, since it is larger than the sum of its proper divisors (2374165066).

2647431878 is a wasteful number, since it uses less digits than its factorization.

2647431878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19557 (or 19550 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 50.

The square root of 2647431878 is about 51453.2008528138. The cubic root of 2647431878 is about 1383.3803355330.

The spelling of 2647431878 in words is "two billion, six hundred forty-seven million, four hundred thirty-one thousand, eight hundred seventy-eight".