87965815801 has 32 divisors (see below), whose sum is σ = 102422396160. Its totient is φ = 74937747456.

The previous prime is 87965815799. The next prime is 87965815831. The reversal of 87965815801 is 10851856978.

It is a cyclic number.

It is not a de Polignac number, because 87965815801 - 2¹ = 87965815799 is a prime.

It is a super-2 number, since 2×87965815801² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87965815831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6954655 + ... + 6967291.

It is an arithmetic number, because the mean of its divisors is an integer number (3200699880).

Almost surely, 2^87965815801 is an apocalyptic number.

It is an amenable number.

87965815801 is a deficient number, since it is larger than the sum of its proper divisors (14456580359).

87965815801 is a wasteful number, since it uses less digits than its factorization.

87965815801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13633.

The product of its (nonzero) digits is 4838400, while the sum is 58.

The spelling of 87965815801 in words is "eighty-seven billion, nine hundred sixty-five million, eight hundred fifteen thousand, eight hundred one".