87881780445 has 8 divisors (see below), whose sum is σ = 140610848736. Its totient is φ = 46870282896.

The previous prime is 87881780429. The next prime is 87881780461. The reversal of 87881780445 is 54408718878.

It is an interprime number because it is at equal distance from previous prime (87881780429) and next prime (87881780461).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87881780445 - 2⁴ = 87881780429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2929392667 + ... + 2929392696.

It is an arithmetic number, because the mean of its divisors is an integer number (17576356092).

Almost surely, 2^87881780445 is an apocalyptic number.

It is an amenable number.

87881780445 is a deficient number, since it is larger than the sum of its proper divisors (52729068291).

87881780445 is a wasteful number, since it uses less digits than its factorization.

87881780445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858785371.

The product of its (nonzero) digits is 16056320, while the sum is 60.

The spelling of 87881780445 in words is "eighty-seven billion, eight hundred eighty-one million, seven hundred eighty thousand, four hundred forty-five".