647040040746 has 64 divisors (see below), whose sum is σ = 1432080470016. Its totient is φ = 193249238400.

The previous prime is 647040040721. The next prime is 647040040771.

647040040746 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (647040040721) and next prime (647040040771).

It is a junction number, because it is equal to n+sod(n) for n = 647040040698 and 647040040707.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6828231 + ... + 6922341.

It is an arithmetic number, because the mean of its divisors is an integer number (22376257344).

Almost surely, 2^647040040746 is an apocalyptic number.

647040040746 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 647040040746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (716040235008).

647040040746 is an abundant number, since it is smaller than the sum of its proper divisors (785040429270).

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

647040040746 is a wasteful number, since it uses less digits than its factorization.

647040040746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95627.

The product of its (nonzero) digits is 451584, while the sum is 42.

The spelling of 647040040746 in words is "six hundred forty-seven billion, forty million, forty thousand, seven hundred forty-six".