87863977905 has 16 divisors (see below), whose sum is σ = 153362579904. Its totient is φ = 42600716480.

The previous prime is 87863977871. The next prime is 87863977907. The reversal of 87863977905 is 50977936878.

It is not a de Polignac number, because 87863977905 - 2⁶ = 87863977841 is a prime.

It is a super-2 number, since 2×87863977905² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87863977905.

It is not an unprimeable number, because it can be changed into a prime (87863977907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266254314 + ... + 266254643.

It is an arithmetic number, because the mean of its divisors is an integer number (9585161244).

Almost surely, 2^87863977905 is an apocalyptic number.

It is an amenable number.

87863977905 is a deficient number, since it is larger than the sum of its proper divisors (65498601999).

87863977905 is a wasteful number, since it uses less digits than its factorization.

87863977905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532508976.

The product of its (nonzero) digits is 160030080, while the sum is 69.

The spelling of 87863977905 in words is "eighty-seven billion, eight hundred sixty-three million, nine hundred seventy-seven thousand, nine hundred five".