1951989363989 has 8 divisors (see below), whose sum is σ = 2291138095488. Its totient is φ = 1627913909520.

The previous prime is 1951989363977. The next prime is 1951989363991. The reversal of 1951989363989 is 9893639891591.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1951989363989 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 (1951989363949) 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 7 ways as a sum of consecutive naturals, for example, 3768318977 + ... + 3768319494.

It is an arithmetic number, because the mean of its divisors is an integer number (286392261936).

Almost surely, 2^{1951989363989} is an apocalyptic number.

It is an amenable number.

1951989363989 is a deficient number, since it is larger than the sum of its proper divisors (339148731499).

1951989363989 is an equidigital number, since it uses as much as digits as its factorization.

1951989363989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536638515.

The product of its digits is 1020366720, while the sum is 80.

The spelling of 1951989363989 in words is "one trillion, nine hundred fifty-one billion, nine hundred eighty-nine million, three hundred sixty-three thousand, nine hundred eighty-nine".