647036936490 has 128 divisors (see below), whose sum is σ = 1824239513088. Its totient is φ = 143775129600.

The previous prime is 647036936489. The next prime is 647036936501. The reversal of 647036936490 is 94639630746.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 647036936490.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9297102 + ... + 9366438.

It is an arithmetic number, because the mean of its divisors is an integer number (14251871196).

Almost surely, 2^647036936490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647036936490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912119756544).

647036936490 is an abundant number, since it is smaller than the sum of its proper divisors (1177202576598).

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

647036936490 is a wasteful number, since it uses less digits than its factorization.

647036936490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70592.

The product of its (nonzero) digits is 17635968, while the sum is 57.

The spelling of 647036936490 in words is "six hundred forty-seven billion, thirty-six million, nine hundred thirty-six thousand, four hundred ninety".