888508491561 has 12 divisors (see below), whose sum is σ = 1350948583920. Its totient is φ = 561163257720.

The previous prime is 888508491553. The next prime is 888508491569. The reversal of 888508491561 is 165194805888.

888508491561 is a `hidden beast` number, since 8 + 8 + 85 + 0 + 8 + 491 + 5 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (888508491553) and next prime (888508491569).

It is not a de Polignac number, because 888508491561 - 2³ = 888508491553 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (888508491569) 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, 2597977875 + ... + 2597978216.

It is an arithmetic number, because the mean of its divisors is an integer number (112579048660).

Almost surely, 2^888508491561 is an apocalyptic number.

It is an amenable number.

888508491561 is a deficient number, since it is larger than the sum of its proper divisors (462440092359).

888508491561 is a wasteful number, since it uses less digits than its factorization.

888508491561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195956116 (or 5195956113 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 63.

The spelling of 888508491561 in words is "eight hundred eighty-eight billion, five hundred eight million, four hundred ninety-one thousand, five hundred sixty-one".