88405709661 has 64 divisors (see below), whose sum is σ = 140414400000. Its totient is φ = 54836559360.

The previous prime is 88405709659. The next prime is 88405709677. The reversal of 88405709661 is 16690750488.

88405709661 is a `hidden beast` number, since 8 + 8 + 4 + 0 + 570 + 9 + 6 + 61 = 666.

It is not a de Polignac number, because 88405709661 - 2¹ = 88405709659 is a prime.

It is a super-3 number, since 3×88405709661³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 88405709598 and 88405709607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88405709641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8880915 + ... + 8890863.

It is an arithmetic number, because the mean of its divisors is an integer number (2193975000).

Almost surely, 2^88405709661 is an apocalyptic number.

It is an amenable number.

88405709661 is a deficient number, since it is larger than the sum of its proper divisors (52008690339).

88405709661 is a wasteful number, since it uses less digits than its factorization.

88405709661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371 (or 10365 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 88405709661 in words is "eighty-eight billion, four hundred five million, seven hundred nine thousand, six hundred sixty-one".