87777808451 has 2 divisors, whose sum is σ = 87777808452. Its totient is φ = 87777808450.

The previous prime is 87777808429. The next prime is 87777808523. The reversal of 87777808451 is 15480877778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87777808451 - 2⁶ = 87777808387 is a prime.

It is not a weakly prime, because it can be changed into another prime (87777808411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43888904225 + 43888904226.

It is an arithmetic number, because the mean of its divisors is an integer number (43888904226).

Almost surely, 2^87777808451 is an apocalyptic number.

87777808451 is a deficient number, since it is larger than the sum of its proper divisors (1).

87777808451 is an equidigital number, since it uses as much as digits as its factorization.

87777808451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24586240, while the sum is 62.

The spelling of 87777808451 in words is "eighty-seven billion, seven hundred seventy-seven million, eight hundred eight thousand, four hundred fifty-one".