1051720520706 has 64 divisors (see below), whose sum is σ = 2400999672960. Its totient is φ = 341002405440.

The previous prime is 1051720520597. The next prime is 1051720520729. The reversal of 1051720520706 is 6070250271501.

1051720520706 is a `hidden beast` number, since 1 + 0 + 517 + 20 + 52 + 0 + 70 + 6 = 666.

It is a super-2 number, since 2×1051720520706² (a number of 25 digits) contains 22 as substring.

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, 7194361 + ... + 7339091.

It is an arithmetic number, because the mean of its divisors is an integer number (37515619890).

Almost surely, 2^{1051720520706} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1051720520706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1200499836480).

1051720520706 is an abundant number, since it is smaller than the sum of its proper divisors (1349279152254).

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

1051720520706 is a wasteful number, since it uses less digits than its factorization.

1051720520706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148416 (or 148410 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The spelling of 1051720520706 in words is "one trillion, fifty-one billion, seven hundred twenty million, five hundred twenty thousand, seven hundred six".