2646400531 has 2 divisors, whose sum is σ = 2646400532. Its totient is φ = 2646400530.

The previous prime is 2646400499. The next prime is 2646400571. The reversal of 2646400531 is 1350046462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2646400531 - 2⁵ = 2646400499 is a prime.

It is a super-2 number, since 2×2646400531² = 14006871540954163922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2646400493 and 2646400502.

It is not a weakly prime, because it can be changed into another prime (2646400571) 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 as a sum of consecutive naturals, namely, 1323200265 + 1323200266.

It is an arithmetic number, because the mean of its divisors is an integer number (1323200266).

Almost surely, 2^2646400531 is an apocalyptic number.

2646400531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646400531 is an equidigital number, since it uses as much as digits as its factorization.

2646400531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 2646400531 is about 51443.1776915074. The cubic root of 2646400531 is about 1383.2006733126.

Adding to 2646400531 its reverse (1350046462), we get a palindrome (3996446993).

The spelling of 2646400531 in words is "two billion, six hundred forty-six million, four hundred thousand, five hundred thirty-one".