191495485440 has 1152 divisors, whose sum is σ = 846308736000. Its totient is φ = 38985007104.

The previous prime is 191495485439. The next prime is 191495485483. The reversal of 191495485440 is 44584594191.

191495485440 is a `hidden beast` number, since 1 + 9 + 1 + 4 + 9 + 548 + 54 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 208373301 + ... + 208374219.

It is an arithmetic number, because the mean of its divisors is an integer number (734643000).

Almost surely, 2^191495485440 is an apocalyptic number.

191495485440 is a gapful number since it is divisible by the number (10) 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 191495485440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423154368000).

191495485440 is an abundant number, since it is smaller than the sum of its proper divisors (654813250560).

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

191495485440 is a wasteful number, since it uses less digits than its factorization.

191495485440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 191495485440 in words is "one hundred ninety-one billion, four hundred ninety-five million, four hundred eighty-five thousand, four hundred forty".