6513636378 has 16 divisors (see below), whose sum is σ = 13036343040. Its totient is φ = 2169700416.

The previous prime is 6513636361. The next prime is 6513636397. The reversal of 6513636378 is 8736363156.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368575 + ... + 385842.

It is an arithmetic number, because the mean of its divisors is an integer number (814771440).

Almost surely, 2^6513636378 is an apocalyptic number.

6513636378 is an abundant number, since it is smaller than the sum of its proper divisors (6522706662).

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

6513636378 is a wasteful number, since it uses less digits than its factorization.

6513636378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755861.

The product of its digits is 1632960, while the sum is 48.

The square root of 6513636378 is about 80707.1024012137. The cubic root of 6513636378 is about 1867.5597420356.

The spelling of 6513636378 in words is "six billion, five hundred thirteen million, six hundred thirty-six thousand, three hundred seventy-eight".