7420551916761 has 27 divisors (see below), whose sum is σ = 10741939266591. Its totient is φ = 4936274538624.

The previous prime is 7420551916721. The next prime is 7420551916769. The reversal of 7420551916761 is 1676191550247.

The square root of 7420551916761 is 2724069.

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

7420551916761 is a `hidden beast` number, since 7 + 4 + 2 + 0 + 5 + 519 + 1 + 67 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3036720979161 + 4383830937600 = 1742619^2 + 2093760^2 .

It is not a de Polignac number, because 7420551916761 - 2¹⁵ = 7420551883993 is a prime.

It is a super-2 number, since 2×7420551916761² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7420551916698 and 7420551916707.

It is not an unprimeable number, because it can be changed into a prime (7420551916769) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5941193865 + ... + 5941195113.

Almost surely, 2^{7420551916761} is an apocalyptic number.

7420551916761 is the 2724069-th square number.

7420551916761 is the 1362035-th centered octagonal number.

It is an amenable number.

7420551916761 is a deficient number, since it is larger than the sum of its proper divisors (3321387349830).

7420551916761 is an frugal number, since it uses more digits than its factorization.

7420551916761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The spelling of 7420551916761 in words is "seven trillion, four hundred twenty billion, five hundred fifty-one million, nine hundred sixteen thousand, seven hundred sixty-one".