197708632151 has 4 divisors (see below), whose sum is σ = 197923767600. Its totient is φ = 197493496704.

The previous prime is 197708632133. The next prime is 197708632159. The reversal of 197708632151 is 151236807791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197708632151 - 2¹⁸ = 197708370007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197708632151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197708632159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107566346 + ... + 107568183.

It is an arithmetic number, because the mean of its divisors is an integer number (49480941900).

Almost surely, 2^197708632151 is an apocalyptic number.

197708632151 is a deficient number, since it is larger than the sum of its proper divisors (215135449).

197708632151 is an equidigital number, since it uses as much as digits as its factorization.

197708632151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215135448.

The product of its (nonzero) digits is 635040, while the sum is 50.

The spelling of 197708632151 in words is "one hundred ninety-seven billion, seven hundred eight million, six hundred thirty-two thousand, one hundred fifty-one".