6488781356 has 12 divisors (see below), whose sum is σ = 11619445992. Its totient is φ = 3168939648.

The previous prime is 6488781347. The next prime is 6488781379. The reversal of 6488781356 is 6531878846.

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, 18862565 + ... + 18862908.

It is an arithmetic number, because the mean of its divisors is an integer number (968287166).

Almost surely, 2^6488781356 is an apocalyptic number.

It is an amenable number.

6488781356 is a deficient number, since it is larger than the sum of its proper divisors (5130664636).

6488781356 is a wasteful number, since it uses less digits than its factorization.

6488781356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37725520 (or 37725518 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 56.

The square root of 6488781356 is about 80552.9723598081. The cubic root of 6488781356 is about 1865.1812751368.

The spelling of 6488781356 in words is "six billion, four hundred eighty-eight million, seven hundred eighty-one thousand, three hundred fifty-six".