890005061601 has 6 divisors (see below), whose sum is σ = 1285562866770. Its totient is φ = 593336707728.

The previous prime is 890005061579. The next prime is 890005061609. The reversal of 890005061601 is 106160500098.

890005061601 is a `hidden beast` number, since 8 + 90 + 0 + 0 + 506 + 1 + 60 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 611563100625 + 278441960976 = 782025^2 + 527676^2 .

It is not a de Polignac number, because 890005061601 - 2¹³ = 890005053409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (890005061609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49444725636 + ... + 49444725653.

It is an arithmetic number, because the mean of its divisors is an integer number (214260477795).

Almost surely, 2^890005061601 is an apocalyptic number.

It is an amenable number.

890005061601 is a deficient number, since it is larger than the sum of its proper divisors (395557805169).

890005061601 is a wasteful number, since it uses less digits than its factorization.

890005061601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98889451295 (or 98889451292 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

Adding to 890005061601 its reverse (106160500098), we get a palindrome (996165561699).

The spelling of 890005061601 in words is "eight hundred ninety billion, five million, sixty-one thousand, six hundred one".