906601720639 has 8 divisors (see below), whose sum is σ = 916824355200. Its totient is φ = 896411488536.

The previous prime is 906601720631. The next prime is 906601720693. The reversal of 906601720639 is 936027106609.

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

It is a cyclic number.

It is not a de Polignac number, because 906601720639 - 2³ = 906601720631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 906601720592 and 906601720601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906601720631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8044339 + ... + 8156260.

It is an arithmetic number, because the mean of its divisors is an integer number (114603044400).

Almost surely, 2^906601720639 is an apocalyptic number.

906601720639 is a deficient number, since it is larger than the sum of its proper divisors (10222634561).

906601720639 is a wasteful number, since it uses less digits than its factorization.

906601720639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16201229.

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 906601720639 in words is "nine hundred six billion, six hundred one million, seven hundred twenty thousand, six hundred thirty-nine".