6436690247664 has 30 divisors (see below), whose sum is σ = 18013792846296. Its totient is φ = 2145563415840.

The previous prime is 6436690247641. The next prime is 6436690247723. The reversal of 6436690247664 is 4667420966346.

6436690247664 is a `hidden beast` number, since 6 + 43 + 6 + 69 + 0 + 2 + 476 + 64 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22349618772 + ... + 22349619059.

Almost surely, 2^{6436690247664} is an apocalyptic number.

It is an amenable number.

6436690247664 is an abundant number, since it is smaller than the sum of its proper divisors (11577102598632).

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

6436690247664 is a wasteful number, since it uses less digits than its factorization.

6436690247664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44699237845 (or 44699237836 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 63.

The spelling of 6436690247664 in words is "six trillion, four hundred thirty-six billion, six hundred ninety million, two hundred forty-seven thousand, six hundred sixty-four".