87321036978451 has 2 divisors, whose sum is σ = 87321036978452. Its totient is φ = 87321036978450.

The previous prime is 87321036978437. The next prime is 87321036978467. The reversal of 87321036978451 is 15487963012378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87321036978451 - 2⁵ = 87321036978419 is a prime.

It is not a weakly prime, because it can be changed into another prime (87321036978431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43660518489225 + 43660518489226.

It is an arithmetic number, because the mean of its divisors is an integer number (43660518489226).

It is a 1-persistent number, because it is pandigital, but 2⋅87321036978451 = 174642073956902 is not.

Almost surely, 2^{87321036978451} is an apocalyptic number.

87321036978451 is a deficient number, since it is larger than the sum of its proper divisors (1).

87321036978451 is an equidigital number, since it uses as much as digits as its factorization.

87321036978451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 87321036978451 in words is "eighty-seven trillion, three hundred twenty-one billion, thirty-six million, nine hundred seventy-eight thousand, four hundred fifty-one".