7420513779844 has 27 divisors (see below), whose sum is σ = 14273872156453. Its totient is φ = 3372933568400.

The previous prime is 7420513779839. The next prime is 7420513779853. The reversal of 7420513779844 is 4489773150247.

It is a happy number.

The square root of 7420513779844 is 2724062.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 765558501444 + 6654955278400 = 874962^2 + 2579720^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59867454 + ... + 59991274.

Almost surely, 2^{7420513779844} is an apocalyptic number.

7420513779844 is the 2724062-nd square number.

It is an amenable number.

7420513779844 is a deficient number, since it is larger than the sum of its proper divisors (6853358376609).

7420513779844 is an frugal number, since it uses more digits than its factorization.

7420513779844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247668 (or 123834 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 61.

The spelling of 7420513779844 in words is "seven trillion, four hundred twenty billion, five hundred thirteen million, seven hundred seventy-nine thousand, eight hundred forty-four".