197992020825 has 72 divisors (see below), whose sum is σ = 375377090400. Its totient is φ = 99478817280.

The previous prime is 197992020823. The next prime is 197992020829. The reversal of 197992020825 is 528020299791.

It is not a de Polignac number, because 197992020825 - 2¹ = 197992020823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197992020823) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 635857 + ... + 894593.

It is an arithmetic number, because the mean of its divisors is an integer number (5213570700).

Almost surely, 2^197992020825 is an apocalyptic number.

197992020825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197992020825 is a deficient number, since it is larger than the sum of its proper divisors (177385069575).

197992020825 is a wasteful number, since it uses less digits than its factorization.

197992020825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258951 (or 258943 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 197992020825 in words is "one hundred ninety-seven billion, nine hundred ninety-two million, twenty thousand, eight hundred twenty-five".