7270421645 has 8 divisors (see below), whose sum is σ = 8724992760. Its totient is φ = 5816012800.

The previous prime is 7270421633. The next prime is 7270421663. The reversal of 7270421645 is 5461240727.

It can be written as a sum of positive squares in 4 ways, for example, as 1677475849 + 5592945796 = 40957^2 + 74786^2 .

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

It is not a de Polignac number, because 7270421645 - 2⁴ = 7270421629 is a prime.

It is a super-3 number, since 3×7270421645³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7270421599 and 7270421608.

It is a congruent number.

It is an unprimeable number.

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, 106445 + ... + 160845.

It is an arithmetic number, because the mean of its divisors is an integer number (1090624095).

Almost surely, 2^7270421645 is an apocalyptic number.

It is an amenable number.

7270421645 is a deficient number, since it is larger than the sum of its proper divisors (1454571115).

7270421645 is a wasteful number, since it uses less digits than its factorization.

7270421645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81135.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 7270421645 is about 85266.7675299117. The cubic root of 7270421645 is about 1937.2538504913.

It can be divided in two parts, 72704 and 21645, that added together give a palindrome (94349).

The spelling of 7270421645 in words is "seven billion, two hundred seventy million, four hundred twenty-one thousand, six hundred forty-five".