280695748643 has 2 divisors, whose sum is σ = 280695748644. Its totient is φ = 280695748642.

The previous prime is 280695748603. The next prime is 280695748649. The reversal of 280695748643 is 346847596082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280695748643 is a prime.

It is not a weakly prime, because it can be changed into another prime (280695748649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140347874321 + 140347874322.

It is an arithmetic number, because the mean of its divisors is an integer number (140347874322).

Almost surely, 2^280695748643 is an apocalyptic number.

280695748643 is a deficient number, since it is larger than the sum of its proper divisors (1).

280695748643 is an equidigital number, since it uses as much as digits as its factorization.

280695748643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69672960, while the sum is 62.

The spelling of 280695748643 in words is "two hundred eighty billion, six hundred ninety-five million, seven hundred forty-eight thousand, six hundred forty-three".