391873642848 has 288 divisors, whose sum is σ = 1191543968160. Its totient is φ = 126610698240.

The previous prime is 391873642841. The next prime is 391873642883. The reversal of 391873642848 is 848246378193.

391873642848 is a `hidden beast` number, since 3 + 91 + 87 + 3 + 6 + 428 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×391873642848² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391873642841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50050198 + ... + 50058026.

It is an arithmetic number, because the mean of its divisors is an integer number (4137305445).

Almost surely, 2^391873642848 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 391873642848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595771984080).

391873642848 is an abundant number, since it is smaller than the sum of its proper divisors (799670325312).

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

391873642848 is a wasteful number, since it uses less digits than its factorization.

391873642848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8052 (or 8032 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 391873642848 in words is "three hundred ninety-one billion, eight hundred seventy-three million, six hundred forty-two thousand, eight hundred forty-eight".