191915016601 has 16 divisors (see below), whose sum is σ = 241154703360. Its totient is φ = 148366648080.

The previous prime is 191915016577. The next prime is 191915016641. The reversal of 191915016601 is 106610519191.

It is not a de Polignac number, because 191915016601 - 2¹⁵ = 191914983833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191915016641) 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, 9802831 + ... + 9822388.

It is an arithmetic number, because the mean of its divisors is an integer number (15072168960).

Almost surely, 2^191915016601 is an apocalyptic number.

191915016601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

191915016601 is a deficient number, since it is larger than the sum of its proper divisors (49239686759).

191915016601 is a wasteful number, since it uses less digits than its factorization.

191915016601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19625364.

The product of its (nonzero) digits is 14580, while the sum is 40.

The spelling of 191915016601 in words is "one hundred ninety-one billion, nine hundred fifteen million, sixteen thousand, six hundred one".