1051720520506 has 8 divisors (see below), whose sum is σ = 1604319438240. Its totient is φ = 516947374428.

The previous prime is 1051720520503. The next prime is 1051720520567. The reversal of 1051720520506 is 6050250271501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1051720520506² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051720520503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4456442766 + ... + 4456443001.

It is an arithmetic number, because the mean of its divisors is an integer number (200539929780).

Almost surely, 2^{1051720520506} is an apocalyptic number.

1051720520506 is a deficient number, since it is larger than the sum of its proper divisors (552598917734).

1051720520506 is an equidigital number, since it uses as much as digits as its factorization.

1051720520506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912885828.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 1051720520506 in words is "one trillion, fifty-one billion, seven hundred twenty million, five hundred twenty thousand, five hundred six".