287881861457 has 4 divisors (see below), whose sum is σ = 287886852096. Its totient is φ = 287876870820.

The previous prime is 287881861453. The next prime is 287881861459. The reversal of 287881861457 is 754168188782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 287881861457 - 2² = 287881861453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 287881861393 and 287881861402.

It is not an unprimeable number, because it can be changed into a prime (287881861453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2407769 + ... + 2524502.

It is an arithmetic number, because the mean of its divisors is an integer number (71971713024).

Almost surely, 2^287881861457 is an apocalyptic number.

It is an amenable number.

287881861457 is a deficient number, since it is larger than the sum of its proper divisors (4990639).

287881861457 is an equidigital number, since it uses as much as digits as its factorization.

287881861457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990638.

The product of its digits is 48168960, while the sum is 65.

The spelling of 287881861457 in words is "two hundred eighty-seven billion, eight hundred eighty-one million, eight hundred sixty-one thousand, four hundred fifty-seven".