197486961021 has 24 divisors (see below), whose sum is σ = 334821312384. Its totient is φ = 109799699040.

The previous prime is 197486960981. The next prime is 197486961097. The reversal of 197486961021 is 120169684791.

197486961021 is a `hidden beast` number, since 19 + 7 + 4 + 8 + 6 + 9 + 610 + 2 + 1 = 666.

It is not a de Polignac number, because 197486961021 - 2⁷ = 197486960893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197486961521) 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, 42358665 + ... + 42363326.

It is an arithmetic number, because the mean of its divisors is an integer number (13950888016).

Almost surely, 2^197486961021 is an apocalyptic number.

It is an amenable number.

197486961021 is a deficient number, since it is larger than the sum of its proper divisors (137334351363).

197486961021 is a wasteful number, since it uses less digits than its factorization.

197486961021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84722041 (or 84722038 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 197486961021 in words is "one hundred ninety-seven billion, four hundred eighty-six million, nine hundred sixty-one thousand, twenty-one".