7980547261 has 2 divisors, whose sum is σ = 7980547262. Its totient is φ = 7980547260.

The previous prime is 7980547243. The next prime is 7980547271. The reversal of 7980547261 is 1627450897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4570571236 + 3409976025 = 67606^2 + 58395^2 .

It is a cyclic number.

It is not a de Polignac number, because 7980547261 - 2¹⁷ = 7980416189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7980547271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990273630 + 3990273631.

It is an arithmetic number, because the mean of its divisors is an integer number (3990273631).

Almost surely, 2^7980547261 is an apocalyptic number.

It is an amenable number.

7980547261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7980547261 is an equidigital number, since it uses as much as digits as its factorization.

7980547261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 7980547261 is about 89333.9087972759. The cubic root of 7980547261 is about 1998.3776227185.

The spelling of 7980547261 in words is "seven billion, nine hundred eighty million, five hundred forty-seven thousand, two hundred sixty-one".