6487137978 has 8 divisors (see below), whose sum is σ = 12974275968. Its totient is φ = 2162379324.

The previous prime is 6487137959. The next prime is 6487137983. The reversal of 6487137978 is 8797317846.

It is a sphenic number, since it is the product of 3 distinct primes.

6487137978 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540594826 + ... + 540594837.

It is an arithmetic number, because the mean of its divisors is an integer number (1621784496).

Almost surely, 2^6487137978 is an apocalyptic number.

6487137978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6487137978 is a wasteful number, since it uses less digits than its factorization.

6487137978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081189668.

The product of its digits is 14224896, while the sum is 60.

The square root of 6487137978 is about 80542.7711095167. The cubic root of 6487137978 is about 1865.0238004375.

The spelling of 6487137978 in words is "six billion, four hundred eighty-seven million, one hundred thirty-seven thousand, nine hundred seventy-eight".