87720442214351 has 2 divisors, whose sum is σ = 87720442214352. Its totient is φ = 87720442214350.

The previous prime is 87720442214311. The next prime is 87720442214407. The reversal of 87720442214351 is 15341224402778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87720442214351 - 2⁶ = 87720442214287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87720442214351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87720442214311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43860221107175 + 43860221107176.

It is an arithmetic number, because the mean of its divisors is an integer number (43860221107176).

Almost surely, 2^{87720442214351} is an apocalyptic number.

87720442214351 is a deficient number, since it is larger than the sum of its proper divisors (1).

87720442214351 is an equidigital number, since it uses as much as digits as its factorization.

87720442214351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3010560, while the sum is 50.

The spelling of 87720442214351 in words is "eighty-seven trillion, seven hundred twenty billion, four hundred forty-two million, two hundred fourteen thousand, three hundred fifty-one".