1949643989740 has 12 divisors (see below), whose sum is σ = 4094252378496. Its totient is φ = 779857595888.

The previous prime is 1949643989647. The next prime is 1949643989767. The reversal of 1949643989740 is 479893469491.

It is a super-2 number, since 2×1949643989740² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48741099724 + ... + 48741099763.

It is an arithmetic number, because the mean of its divisors is an integer number (341187698208).

Almost surely, 2^{1949643989740} is an apocalyptic number.

1949643989740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1949643989740 is an abundant number, since it is smaller than the sum of its proper divisors (2144608388756).

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

1949643989740 is a wasteful number, since it uses less digits than its factorization.

1949643989740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97482199496 (or 97482199494 counting only the distinct ones).

The product of its (nonzero) digits is 423263232, while the sum is 73.

The spelling of 1949643989740 in words is "one trillion, nine hundred forty-nine billion, six hundred forty-three million, nine hundred eighty-nine thousand, seven hundred forty".