1955198017363 has 4 divisors (see below), whose sum is σ = 1955698455880. Its totient is φ = 1954697578848.

The previous prime is 1955198017351. The next prime is 1955198017379. The reversal of 1955198017363 is 3637108915591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1955198017363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1955198017298 and 1955198017307.

It is not an unprimeable number, because it can be changed into a prime (1955198017303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250213398 + ... + 250221211.

It is an arithmetic number, because the mean of its divisors is an integer number (488924613970).

Almost surely, 2^{1955198017363} is an apocalyptic number.

1955198017363 is a deficient number, since it is larger than the sum of its proper divisors (500438517).

1955198017363 is an equidigital number, since it uses as much as digits as its factorization.

1955198017363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500438516.

The product of its (nonzero) digits is 6123600, while the sum is 58.

The spelling of 1955198017363 in words is "one trillion, nine hundred fifty-five billion, one hundred ninety-eight million, seventeen thousand, three hundred sixty-three".