191081992948 has 96 divisors (see below), whose sum is σ = 423445091328. Its totient is φ = 73281542400.

The previous prime is 191081992901. The next prime is 191081992949. The reversal of 191081992948 is 849299180191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191081992949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37369240 + ... + 37374352.

It is an arithmetic number, because the mean of its divisors is an integer number (4410886368).

Almost surely, 2^191081992948 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 191081992948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211722545664).

191081992948 is an abundant number, since it is smaller than the sum of its proper divisors (232363098380).

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

191081992948 is a wasteful number, since it uses less digits than its factorization.

191081992948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013 (or 7011 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 61.

The spelling of 191081992948 in words is "one hundred ninety-one billion, eighty-one million, nine hundred ninety-two thousand, nine hundred forty-eight".