1019998426644 has 36 divisors (see below), whose sum is σ = 2578485349440. Its totient is φ = 339978905040.

The previous prime is 1019998426627. The next prime is 1019998426669. The reversal of 1019998426644 is 4466248999101.

1019998426644 is a `hidden beast` number, since 10 + 199 + 9 + 8 + 426 + 6 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247884 + ... + 1449635.

It is an arithmetic number, because the mean of its divisors is an integer number (71624593040).

Almost surely, 2^{1019998426644} is an apocalyptic number.

It is an amenable number.

1019998426644 is an abundant number, since it is smaller than the sum of its proper divisors (1558486922796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1019998426644 is a wasteful number, since it uses less digits than its factorization.

1019998426644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714220 (or 1714215 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 1019998426644 in words is "one trillion, nineteen billion, nine hundred ninety-eight million, four hundred twenty-six thousand, six hundred forty-four".