7054887921721 has 4 divisors (see below), whose sum is σ = 7245560568292. Its totient is φ = 6864215275152.

The previous prime is 7054887921677. The next prime is 7054887921727. The reversal of 7054887921721 is 1271297884507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5849679169321 + 1205208752400 = 2418611^2 + 1097820^2 .

It is a cyclic number.

It is not a de Polignac number, because 7054887921721 - 2⁷ = 7054887921593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7054887921721.

It is not an unprimeable number, because it can be changed into a prime (7054887921727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95336323230 + ... + 95336323303.

It is an arithmetic number, because the mean of its divisors is an integer number (1811390142073).

Almost surely, 2^{7054887921721} is an apocalyptic number.

It is an amenable number.

7054887921721 is a deficient number, since it is larger than the sum of its proper divisors (190672646571).

7054887921721 is a wasteful number, since it uses less digits than its factorization.

7054887921721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190672646570.

The product of its (nonzero) digits is 15805440, while the sum is 61.

The spelling of 7054887921721 in words is "seven trillion, fifty-four billion, eight hundred eighty-seven million, nine hundred twenty-one thousand, seven hundred twenty-one".