61640116658884 has 27 divisors (see below), whose sum is σ = 111463016248143. Its totient is φ = 29825627365800.

The previous prime is 61640116658851. The next prime is 61640116658917. The reversal of 61640116658884 is 48885661104616.

The square root of 61640116658884 is 7851122.

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

It is an interprime number because it is at equal distance from previous prime (61640116658851) and next prime (61640116658917).

It is a super-3 number, since 3×61640116658884³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 486706249 + ... + 486832879.

Almost surely, 2^{61640116658884} is an apocalyptic number.

61640116658884 is the 7851122-nd square number.

It is an amenable number.

61640116658884 is a deficient number, since it is larger than the sum of its proper divisors (49822899589259).

61640116658884 is an frugal number, since it uses more digits than its factorization.

61640116658884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253328 (or 126664 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 64.

The spelling of 61640116658884 in words is "sixty-one trillion, six hundred forty billion, one hundred sixteen million, six hundred fifty-eight thousand, eight hundred eighty-four".