87023553447647 has 16 divisors (see below), whose sum is σ = 90379195103232. Its totient is φ = 83702306120160.

The previous prime is 87023553447641. The next prime is 87023553447653. The reversal of 87023553447647 is 74674435532078.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87023553447641) and next prime (87023553447653).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87023553447647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87023553447641) 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, 43687733 + ... + 45636225.

It is an arithmetic number, because the mean of its divisors is an integer number (5648699693952).

Almost surely, 2^{87023553447647} is an apocalyptic number.

87023553447647 is a deficient number, since it is larger than the sum of its proper divisors (3355641655585).

87023553447647 is a wasteful number, since it uses less digits than its factorization.

87023553447647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957318.

The product of its (nonzero) digits is 474163200, while the sum is 65.

The spelling of 87023553447647 in words is "eighty-seven trillion, twenty-three billion, five hundred fifty-three million, four hundred forty-seven thousand, six hundred forty-seven".