280252072661 has 16 divisors (see below), whose sum is σ = 310399786368. Its totient is φ = 250891166400.

The previous prime is 280252072649. The next prime is 280252072673. The reversal of 280252072661 is 166270252082.

It is an interprime number because it is at equal distance from previous prime (280252072649) and next prime (280252072673).

It is not a de Polignac number, because 280252072661 - 2¹⁰ = 280252071637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280252072601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455855 + ... + 876531.

It is an arithmetic number, because the mean of its divisors is an integer number (19399986648).

Almost surely, 2^280252072661 is an apocalyptic number.

It is an amenable number.

280252072661 is a deficient number, since it is larger than the sum of its proper divisors (30147713707).

280252072661 is a wasteful number, since it uses less digits than its factorization.

280252072661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421612.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 280252072661 in words is "two hundred eighty billion, two hundred fifty-two million, seventy-two thousand, six hundred sixty-one".