197861045751 has 12 divisors (see below), whose sum is σ = 286478151960. Its totient is φ = 131594042160.

The previous prime is 197861045741. The next prime is 197861045771. The reversal of 197861045751 is 157540168791.

197861045751 is a `hidden beast` number, since 1 + 9 + 7 + 8 + 61 + 0 + 4 + 575 + 1 = 666.

It is not a de Polignac number, because 197861045751 - 2¹³ = 197861037559 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197861045741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26106141 + ... + 26113718.

It is an arithmetic number, because the mean of its divisors is an integer number (23873179330).

Almost surely, 2^197861045751 is an apocalyptic number.

197861045751 is a deficient number, since it is larger than the sum of its proper divisors (88617106209).

197861045751 is a wasteful number, since it uses less digits than its factorization.

197861045751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52220286 (or 52220283 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 54.

The spelling of 197861045751 in words is "one hundred ninety-seven billion, eight hundred sixty-one million, forty-five thousand, seven hundred fifty-one".