4781987898197 has 4 divisors (see below), whose sum is σ = 4786626102816. Its totient is φ = 4777349693580.

The previous prime is 4781987898131. The next prime is 4781987898203. The reversal of 4781987898197 is 7918987891874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4781987898197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4781987898497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319100763 + ... + 2319102824.

It is an arithmetic number, because the mean of its divisors is an integer number (1196656525704).

Almost surely, 2^{4781987898197} is an apocalyptic number.

It is an amenable number.

4781987898197 is a deficient number, since it is larger than the sum of its proper divisors (4638204619).

4781987898197 is a wasteful number, since it uses less digits than its factorization.

4781987898197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638204618.

The product of its digits is 4096770048, while the sum is 86.

The spelling of 4781987898197 in words is "four trillion, seven hundred eighty-one billion, nine hundred eighty-seven million, eight hundred ninety-eight thousand, one hundred ninety-seven".