88971919785 has 36 divisors (see below), whose sum is σ = 179396446788. Its totient is φ = 40672876608.

The previous prime is 88971919781. The next prime is 88971919787. The reversal of 88971919785 is 58791917988.

It can be written as a sum of positive squares in 2 ways, for example, as 28727199081 + 60244720704 = 169491^2 + 245448^2 .

It is not a de Polignac number, because 88971919785 - 2² = 88971919781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88971919781) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20172834 + ... + 20177243.

It is an arithmetic number, because the mean of its divisors is an integer number (4983234633).

Almost surely, 2^88971919785 is an apocalyptic number.

It is an amenable number.

88971919785 is an abundant number, since it is smaller than the sum of its proper divisors (90424527003).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

88971919785 is a wasteful number, since it uses less digits than its factorization.

88971919785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40350102 (or 40350092 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 72.

The spelling of 88971919785 in words is "eighty-eight billion, nine hundred seventy-one million, nine hundred nineteen thousand, seven hundred eighty-five".