191403152928 has 144 divisors (see below), whose sum is σ = 607882556736. Its totient is φ = 58893246720.

The previous prime is 191403152873. The next prime is 191403152929. The reversal of 191403152928 is 829251304191.

191403152928 is a `hidden beast` number, since 1 + 9 + 1 + 40 + 315 + 292 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (191403152929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 845628 + ... + 1047803.

It is an arithmetic number, because the mean of its divisors is an integer number (4221406644).

Almost surely, 2^191403152928 is an apocalyptic number.

191403152928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

191403152928 is an abundant number, since it is smaller than the sum of its proper divisors (416479403808).

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

191403152928 is a wasteful number, since it uses less digits than its factorization.

191403152928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893469 (or 1893449 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 191403152928 in words is "one hundred ninety-one billion, four hundred three million, one hundred fifty-two thousand, nine hundred twenty-eight".