647860898677440 has 896 divisors, whose sum is σ = 2384320623280128. Its totient is φ = 145989376081920.

The previous prime is 647860898677361. The next prime is 647860898677519. The reversal of 647860898677440 is 44776898068746.

647860898677440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (647860898677361) and next prime (647860898677519).

It is a Harshad number since it is a multiple of its sum of digits (84).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 89446482459 + ... + 89446489701.

Almost surely, 2^{647860898677440} is an apocalyptic number.

647860898677440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647860898677440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1192160311640064).

647860898677440 is an abundant number, since it is smaller than the sum of its proper divisors (1736459724602688).

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

647860898677440 is a wasteful number, since it uses less digits than its factorization.

647860898677440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8045 (or 8035 counting only the distinct ones).

The product of its (nonzero) digits is 21849440256, while the sum is 84.

The spelling of 647860898677440 in words is "six hundred forty-seven trillion, eight hundred sixty billion, eight hundred ninety-eight million, six hundred seventy-seven thousand, four hundred forty".