1721531481834 has 32 divisors (see below), whose sum is σ = 3562953978240. Its totient is φ = 553874932800.

The previous prime is 1721531481833. The next prime is 1721531481883. The reversal of 1721531481834 is 4381841351271.

It is not an unprimeable number, because it can be changed into a prime (1721531481833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1083502 + ... + 2148729.

It is an arithmetic number, because the mean of its divisors is an integer number (111342311820).

Almost surely, 2^{1721531481834} is an apocalyptic number.

1721531481834 is an abundant number, since it is smaller than the sum of its proper divisors (1841422496406).

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

1721531481834 is a wasteful number, since it uses less digits than its factorization.

1721531481834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235326.

The product of its digits is 645120, while the sum is 48.

The spelling of 1721531481834 in words is "one trillion, seven hundred twenty-one billion, five hundred thirty-one million, four hundred eighty-one thousand, eight hundred thirty-four".