87111250649 has 4 divisors (see below), whose sum is σ = 87776222160. Its totient is φ = 86446279140.

The previous prime is 87111250637. The next prime is 87111250651. The reversal of 87111250649 is 94605211178.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94605211178 = 2 ⋅47302605589.

It is a cyclic number.

It is not a de Polignac number, because 87111250649 - 2²⁰ = 87110202073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87111250669) 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, 332485559 + ... + 332485820.

It is an arithmetic number, because the mean of its divisors is an integer number (21944055540).

Almost surely, 2^87111250649 is an apocalyptic number.

It is an amenable number.

87111250649 is a deficient number, since it is larger than the sum of its proper divisors (664971511).

87111250649 is a wasteful number, since it uses less digits than its factorization.

87111250649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664971510.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 87111250649 in words is "eighty-seven billion, one hundred eleven million, two hundred fifty thousand, six hundred forty-nine".