87621599911 has 16 divisors (see below), whose sum is σ = 90238252608. Its totient is φ = 85052620800.

The previous prime is 87621599867. The next prime is 87621599929. The reversal of 87621599911 is 11999512678.

It is a cyclic number.

It is not a de Polignac number, because 87621599911 - 2¹³ = 87621591719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87621599711) 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, 1296231 + ... + 1362151.

It is an arithmetic number, because the mean of its divisors is an integer number (5639890788).

Almost surely, 2^87621599911 is an apocalyptic number.

87621599911 is a deficient number, since it is larger than the sum of its proper divisors (2616652697).

87621599911 is a wasteful number, since it uses less digits than its factorization.

87621599911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66282.

The product of its digits is 2449440, while the sum is 58.

The spelling of 87621599911 in words is "eighty-seven billion, six hundred twenty-one million, five hundred ninety-nine thousand, nine hundred eleven".