5451016561 has 27 divisors (see below), whose sum is σ = 5987598753. Its totient is φ = 4961443200.

The previous prime is 5451016541. The next prime is 5451016567. The reversal of 5451016561 is 1656101545.

The square root of 5451016561 is 73831.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3246150625 + 2204865936 = 56975^2 + 46956^2 .

It is not a de Polignac number, because 5451016561 - 2¹³ = 5451008369 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5451016567) 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, 53970411 + ... + 53970511.

Almost surely, 2^5451016561 is an apocalyptic number.

5451016561 is the 73831-st square number.

5451016561 is the 36916-th centered octagonal number.

It is an amenable number.

5451016561 is a deficient number, since it is larger than the sum of its proper divisors (536582192).

5451016561 is an equidigital number, since it uses as much as digits as its factorization.

5451016561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The cubic root of 5451016561 is about 1759.9182728277.

The spelling of 5451016561 in words is "five billion, four hundred fifty-one million, sixteen thousand, five hundred sixty-one".