10056061721 has 8 divisors (see below), whose sum is σ = 10439590080. Its totient is φ = 9674984592.

The previous prime is 10056061709. The next prime is 10056061727. The reversal of 10056061721 is 12716065001.

10056061721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10056061721 is a prime.

It is a super-2 number, since 2×10056061721² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10056061727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604445 + ... + 620858.

It is an arithmetic number, because the mean of its divisors is an integer number (1304948760).

Almost surely, 2^10056061721 is an apocalyptic number.

It is an amenable number.

10056061721 is a deficient number, since it is larger than the sum of its proper divisors (383528359).

10056061721 is a wasteful number, since it uses less digits than its factorization.

10056061721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225615.

The product of its (nonzero) digits is 2520, while the sum is 29.

The spelling of 10056061721 in words is "ten billion, fifty-six million, sixty-one thousand, seven hundred twenty-one".