198625811963 has 2 divisors, whose sum is σ = 198625811964. Its totient is φ = 198625811962.

The previous prime is 198625811921. The next prime is 198625811983. The reversal of 198625811963 is 369118526891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198625811963 - 2⁸ = 198625811707 is a prime.

It is a super-2 number, since 2×198625811963² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198625811983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99312905981 + 99312905982.

It is an arithmetic number, because the mean of its divisors is an integer number (99312905982).

Almost surely, 2^198625811963 is an apocalyptic number.

198625811963 is a deficient number, since it is larger than the sum of its proper divisors (1).

198625811963 is an equidigital number, since it uses as much as digits as its factorization.

198625811963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 59.

The spelling of 198625811963 in words is "one hundred ninety-eight billion, six hundred twenty-five million, eight hundred eleven thousand, nine hundred sixty-three".