87851215877 has 8 divisors (see below), whose sum is σ = 93021581952. Its totient is φ = 82681144000.

The previous prime is 87851215867. The next prime is 87851215889. The reversal of 87851215877 is 77851215878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87851215877 - 2⁴ = 87851215861 is a prime.

It is a super-2 number, since 2×87851215877² (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 (87851215807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942002 + ... + 1031052.

It is an arithmetic number, because the mean of its divisors is an integer number (11627697744).

Almost surely, 2^87851215877 is an apocalyptic number.

It is an amenable number.

87851215877 is a deficient number, since it is larger than the sum of its proper divisors (5170366075).

87851215877 is a wasteful number, since it uses less digits than its factorization.

87851215877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147099.

The product of its digits is 8780800, while the sum is 59.

Subtracting from 87851215877 its reverse (77851215878), we obtain a palindrome (9999999999).

The spelling of 87851215877 in words is "eighty-seven billion, eight hundred fifty-one million, two hundred fifteen thousand, eight hundred seventy-seven".