87813654743461 has 2 divisors, whose sum is σ = 87813654743462. Its totient is φ = 87813654743460.

The previous prime is 87813654743459. The next prime is 87813654743467. The reversal of 87813654743461 is 16434745631878.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83093981048100 + 4719673695361 = 9115590^2 + 2172481^2 .

It is a cyclic number.

It is not a de Polignac number, because 87813654743461 - 2¹ = 87813654743459 is a prime.

It is a super-2 number, since 2×87813654743461² (a number of 29 digits) contains 22 as substring.

Together with 87813654743459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87813654743467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43906827371730 + 43906827371731.

It is an arithmetic number, because the mean of its divisors is an integer number (43906827371731).

Almost surely, 2^{87813654743461} is an apocalyptic number.

It is an amenable number.

87813654743461 is a deficient number, since it is larger than the sum of its proper divisors (1).

87813654743461 is an equidigital number, since it uses as much as digits as its factorization.

87813654743461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 325140480, while the sum is 67.

The spelling of 87813654743461 in words is "eighty-seven trillion, eight hundred thirteen billion, six hundred fifty-four million, seven hundred forty-three thousand, four hundred sixty-one".