46638289681 has 3 divisors (see below), whose sum is σ = 46638505641. Its totient is φ = 46638073722.

The previous prime is 46638289613. The next prime is 46638289693. The reversal of 46638289681 is 18698283664.

The square root of 46638289681 is 215959.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 46638289681 - 2¹³ = 46638281489 is a prime.

It is a super-4 number, since 4×46638289681⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (46638284681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 107980 + ... + 323938.

It is an arithmetic number, because the mean of its divisors is an integer number (15546168547).

Almost surely, 2^46638289681 is an apocalyptic number.

46638289681 is the 215959-th square number.

46638289681 is the 107980-th centered octagonal number.

It is an amenable number.

46638289681 is a deficient number, since it is larger than the sum of its proper divisors (215960).

46638289681 is an frugal number, since it uses more digits than its factorization.

46638289681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431918 (or 215959 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 61.

The spelling of 46638289681 in words is "forty-six billion, six hundred thirty-eight million, two hundred eighty-nine thousand, six hundred eighty-one".