5106581861645 has 16 divisors (see below), whose sum is σ = 6689369351232. Its totient is φ = 3711439128960.

The previous prime is 5106581861621. The next prime is 5106581861663. The reversal of 5106581861645 is 5461681856015.

It is not a de Polignac number, because 5106581861645 - 2¹² = 5106581857549 is a prime.

It is a super-3 number, since 3×5106581861645³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30397832 + ... + 30565361.

It is an arithmetic number, because the mean of its divisors is an integer number (418085584452).

Almost surely, 2^{5106581861645} is an apocalyptic number.

5106581861645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5106581861645 is a deficient number, since it is larger than the sum of its proper divisors (1582787489587).

5106581861645 is a wasteful number, since it uses less digits than its factorization.

5106581861645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60964732.

The product of its (nonzero) digits is 6912000, while the sum is 56.

The spelling of 5106581861645 in words is "five trillion, one hundred six billion, five hundred eighty-one million, eight hundred sixty-one thousand, six hundred forty-five".