88858691721 has 12 divisors (see below), whose sum is σ = 128828590020. Its totient is φ = 59018906400.

The previous prime is 88858691659. The next prime is 88858691749. The reversal of 88858691721 is 12719685888.

It can be written as a sum of positive squares in 2 ways, for example, as 46770117696 + 42088574025 = 216264^2 + 205155^2 .

It is not a de Polignac number, because 88858691721 - 2⁹ = 88858691209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88858691771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18349230 + ... + 18354071.

It is an arithmetic number, because the mean of its divisors is an integer number (10735715835).

Almost surely, 2^88858691721 is an apocalyptic number.

It is an amenable number.

88858691721 is a deficient number, since it is larger than the sum of its proper divisors (39969898299).

88858691721 is a wasteful number, since it uses less digits than its factorization.

88858691721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36703576 (or 36703573 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 63.

The spelling of 88858691721 in words is "eighty-eight billion, eight hundred fifty-eight million, six hundred ninety-one thousand, seven hundred twenty-one".