88156561 has 12 divisors (see below), whose sum is σ = 94640400. Its totient is φ = 82081368.

The previous prime is 88156531. The next prime is 88156573. The reversal of 88156561 is 16565188.

It is not a de Polignac number, because 88156561 - 2¹³ = 88148369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88156501) 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, 19230 + ... + 23368.

It is an arithmetic number, because the mean of its divisors is an integer number (7886700).

Almost surely, 2^88156561 is an apocalyptic number.

It is an amenable number.

88156561 is a deficient number, since it is larger than the sum of its proper divisors (6483839).

88156561 is a wasteful number, since it uses less digits than its factorization.

88156561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236 (or 4217 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 88156561 is about 9389.1725407514. The cubic root of 88156561 is about 445.0596410405.

It can be divided in two parts, 8815 and 6561, that added together give a square (15376 = 124²).

The spelling of 88156561 in words is "eighty-eight million, one hundred fifty-six thousand, five hundred sixty-one".