1720946497440 has 192 divisors, whose sum is σ = 5449143974400. Its totient is φ = 456538865664.

The previous prime is 1720946497429. The next prime is 1720946497471. The reversal of 1720946497440 is 447946490271.

It is a happy 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, 122628664 + ... + 122642696.

It is an arithmetic number, because the mean of its divisors is an integer number (28380958200).

Almost surely, 2^{1720946497440} is an apocalyptic number.

1720946497440 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 1720946497440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2724571987200).

1720946497440 is an abundant number, since it is smaller than the sum of its proper divisors (3728197476960).

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

1720946497440 is a wasteful number, since it uses less digits than its factorization.

1720946497440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15359 (or 15351 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 1720946497440 in words is "one trillion, seven hundred twenty billion, nine hundred forty-six million, four hundred ninety-seven thousand, four hundred forty".