191551361360 has 40 divisors (see below), whose sum is σ = 454832603136. Its totient is φ = 74990318720.

The previous prime is 191551361321. The next prime is 191551361369. The reversal of 191551361360 is 63163155191.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191551361369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25468496 + ... + 25476015.

Almost surely, 2^191551361360 is an apocalyptic number.

191551361360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191551361360 is an abundant number, since it is smaller than the sum of its proper divisors (263281241776).

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

191551361360 is a wasteful number, since it uses less digits than its factorization.

191551361360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50944571 (or 50944565 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 41.

The spelling of 191551361360 in words is "one hundred ninety-one billion, five hundred fifty-one million, three hundred sixty-one thousand, three hundred sixty".