87854008781 has 16 divisors (see below), whose sum is σ = 115297128960. Its totient is φ = 64854632880.

The previous prime is 87854008757. The next prime is 87854008789. The reversal of 87854008781 is 18780045878.

It is a cyclic number.

It is not a de Polignac number, because 87854008781 - 2⁶ = 87854008717 is a prime.

It is a super-2 number, since 2×87854008781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87854008789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30023831 + ... + 30026756.

It is an arithmetic number, because the mean of its divisors is an integer number (7206070560).

Almost surely, 2^87854008781 is an apocalyptic number.

It is an amenable number.

87854008781 is a deficient number, since it is larger than the sum of its proper divisors (27443120179).

87854008781 is a wasteful number, since it uses less digits than its factorization.

87854008781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60050624.

The product of its (nonzero) digits is 4014080, while the sum is 56.

The spelling of 87854008781 in words is "eighty-seven billion, eight hundred fifty-four million, eight thousand, seven hundred eighty-one".