87418632647 has 2 divisors, whose sum is σ = 87418632648. Its totient is φ = 87418632646.

The previous prime is 87418632641. The next prime is 87418632701. The reversal of 87418632647 is 74623681478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87418632647 - 2⁶ = 87418632583 is a prime.

It is a super-2 number, since 2×87418632647² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87418632592 and 87418632601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87418632641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43709316323 + 43709316324.

It is an arithmetic number, because the mean of its divisors is an integer number (43709316324).

Almost surely, 2^87418632647 is an apocalyptic number.

87418632647 is a deficient number, since it is larger than the sum of its proper divisors (1).

87418632647 is an equidigital number, since it uses as much as digits as its factorization.

87418632647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 56.

The spelling of 87418632647 in words is "eighty-seven billion, four hundred eighteen million, six hundred thirty-two thousand, six hundred forty-seven".