191803973452 has 48 divisors (see below), whose sum is σ = 413345786112. Its totient is φ = 75836335680.

The previous prime is 191803973437. The next prime is 191803973453. The reversal of 191803973452 is 254379308191.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 191803973452.

It is not an unprimeable number, because it can be changed into a prime (191803973453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513723 + ... + 804685.

It is an arithmetic number, because the mean of its divisors is an integer number (8611370544).

Almost surely, 2^191803973452 is an apocalyptic number.

It is an amenable number.

191803973452 is an abundant number, since it is smaller than the sum of its proper divisors (221541812660).

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

191803973452 is a wasteful number, since it uses less digits than its factorization.

191803973452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292798 (or 292796 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 191803973452 in words is "one hundred ninety-one billion, eight hundred three million, nine hundred seventy-three thousand, four hundred fifty-two".