1722905901940 has 96 divisors (see below), whose sum is σ = 3758786519040. Its totient is φ = 662663760000.

The previous prime is 1722905901901. The next prime is 1722905901961. The reversal of 1722905901940 is 491095092271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65191569 + ... + 65217991.

It is an arithmetic number, because the mean of its divisors is an integer number (39154026240).

Almost surely, 2^{1722905901940} is an apocalyptic number.

1722905901940 is a gapful number since it is divisible by the number (10) 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 1722905901940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879393259520).

1722905901940 is an abundant number, since it is smaller than the sum of its proper divisors (2035880617100).

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

1722905901940 is a wasteful number, since it uses less digits than its factorization.

1722905901940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27133 (or 27131 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 1722905901940 in words is "one trillion, seven hundred twenty-two billion, nine hundred five million, nine hundred one thousand, nine hundred forty".