149170196991 has 8 divisors (see below), whose sum is σ = 199013201920. Its totient is φ = 99386995032.

The previous prime is 149170196963. The next prime is 149170196999. The reversal of 149170196991 is 199691071941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149170196991 - 2⁷ = 149170196863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149170196999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14944921 + ... + 14954898.

It is an arithmetic number, because the mean of its divisors is an integer number (24876650240).

Almost surely, 2^149170196991 is an apocalyptic number.

149170196991 is a deficient number, since it is larger than the sum of its proper divisors (49843004929).

149170196991 is a wasteful number, since it uses less digits than its factorization.

149170196991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29901485.

The product of its (nonzero) digits is 1102248, while the sum is 57.

The spelling of 149170196991 in words is "one hundred forty-nine billion, one hundred seventy million, one hundred ninety-six thousand, nine hundred ninety-one".