197147510791 has 24 divisors (see below), whose sum is σ = 248901094400. Its totient is φ = 152849339280.

The previous prime is 197147510773. The next prime is 197147510803. The reversal of 197147510791 is 197015741791.

It is not a de Polignac number, because 197147510791 - 2⁵ = 197147510759 is a prime.

It is a super-2 number, since 2×197147510791² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197147510701) 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, 416271 + ... + 753376.

Almost surely, 2^197147510791 is an apocalyptic number.

197147510791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

197147510791 is a deficient number, since it is larger than the sum of its proper divisors (51753583609).

197147510791 is a wasteful number, since it uses less digits than its factorization.

197147510791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169875 (or 1169864 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 52.

The spelling of 197147510791 in words is "one hundred ninety-seven billion, one hundred forty-seven million, five hundred ten thousand, seven hundred ninety-one".