651591717606 has 32 divisors (see below), whose sum is σ = 1464251061600. Its totient is φ = 214756819200.

The previous prime is 651591717563. The next prime is 651591717607. The reversal of 651591717606 is 606717195156.

651591717606 is a `hidden beast` number, since 6 + 5 + 1 + 5 + 9 + 17 + 17 + 606 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651591717607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67784595 + ... + 67794206.

It is an arithmetic number, because the mean of its divisors is an integer number (45757845675).

Almost surely, 2^651591717606 is an apocalyptic number.

651591717606 is an abundant number, since it is smaller than the sum of its proper divisors (812659343994).

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

651591717606 is a wasteful number, since it uses less digits than its factorization.

651591717606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135578901 (or 135578895 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 54.

The spelling of 651591717606 in words is "six hundred fifty-one billion, five hundred ninety-one million, seven hundred seventeen thousand, six hundred six".