947789091648 has 336 divisors, whose sum is σ = 3242329848576. Its totient is φ = 258816983040.

The previous prime is 947789091577. The next prime is 947789091709. The reversal of 947789091648 is 846190987749.

947789091648 is a `hidden beast` number, since 9 + 477 + 8 + 9 + 0 + 91 + 64 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144015718 + ... + 144022298.

It is an arithmetic number, because the mean of its divisors is an integer number (9649791216).

Almost surely, 2^947789091648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 947789091648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621164924288).

947789091648 is an abundant number, since it is smaller than the sum of its proper divisors (2294540756928).

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

947789091648 is a wasteful number, since it uses less digits than its factorization.

947789091648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8182 (or 8169 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 72.

The spelling of 947789091648 in words is "nine hundred forty-seven billion, seven hundred eighty-nine million, ninety-one thousand, six hundred forty-eight".