1929090991044 has 96 divisors (see below), whose sum is σ = 5195051237376. Its totient is φ = 545726862720.

The previous prime is 1929090991001. The next prime is 1929090991049. The reversal of 1929090991044 is 4401990909291.

It is not an unprimeable number, because it can be changed into a prime (1929090991049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65229949 + ... + 65259515.

It is an arithmetic number, because the mean of its divisors is an integer number (54115117056).

Almost surely, 2^{1929090991044} is an apocalyptic number.

1929090991044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1929090991044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597525618688).

1929090991044 is an abundant number, since it is smaller than the sum of its proper divisors (3265960246332).

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

1929090991044 is a wasteful number, since it uses less digits than its factorization.

1929090991044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37225 (or 37223 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 57.

The spelling of 1929090991044 in words is "one trillion, nine hundred twenty-nine billion, ninety million, nine hundred ninety-one thousand, forty-four".