87331640121 has 48 divisors (see below), whose sum is σ = 139513570560. Its totient is φ = 52198997760.

The previous prime is 87331640093. The next prime is 87331640131. The reversal of 87331640121 is 12104613378.

It is a happy number.

87331640121 is a `hidden beast` number, since 8 + 7 + 3 + 3 + 1 + 640 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 87331640121 - 2⁶ = 87331640057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87331640131) 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 in 47 ways as a sum of consecutive naturals, for example, 7447555 + ... + 7459271.

It is an arithmetic number, because the mean of its divisors is an integer number (2906532720).

Almost surely, 2^87331640121 is an apocalyptic number.

It is an amenable number.

87331640121 is a deficient number, since it is larger than the sum of its proper divisors (52181930439).

87331640121 is a wasteful number, since it uses less digits than its factorization.

87331640121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12766 (or 12763 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 87331640121 in words is "eighty-seven billion, three hundred thirty-one million, six hundred forty thousand, one hundred twenty-one".