1720661260530 has 16 divisors (see below), whose sum is σ = 4129587025344. Its totient is φ = 458843002800.

The previous prime is 1720661260501. The next prime is 1720661260537. The reversal of 1720661260530 is 350621660271.

It is not an unprimeable number, because it can be changed into a prime (1720661260537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28677687646 + ... + 28677687705.

It is an arithmetic number, because the mean of its divisors is an integer number (258099189084).

Almost surely, 2^{1720661260530} is an apocalyptic number.

1720661260530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1720661260530 is an abundant number, since it is smaller than the sum of its proper divisors (2408925764814).

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

1720661260530 is a wasteful number, since it uses less digits than its factorization.

1720661260530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57355375361.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 1720661260530 in words is "one trillion, seven hundred twenty billion, six hundred sixty-one million, two hundred sixty thousand, five hundred thirty".