198774523007 has 8 divisors (see below), whose sum is σ = 199796436576. Its totient is φ = 197752740192.

The previous prime is 198774522979. The next prime is 198774523009. The reversal of 198774523007 is 700325477891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198774523007 - 2¹² = 198774518911 is a prime.

It is a super-2 number, since 2×198774523007² (a number of 23 digits) contains 22 as substring.

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 198774523007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198774523009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4964753 + ... + 5004629.

It is an arithmetic number, because the mean of its divisors is an integer number (24974554572).

Almost surely, 2^198774523007 is an apocalyptic number.

198774523007 is a deficient number, since it is larger than the sum of its proper divisors (1021913569).

198774523007 is a wasteful number, since it uses less digits than its factorization.

198774523007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65377.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 198774523007 in words is "one hundred ninety-eight billion, seven hundred seventy-four million, five hundred twenty-three thousand, seven".