61000011000019 has 24 divisors (see below), whose sum is σ = 75490530919200. Its totient is φ = 48263052135168.

The previous prime is 61000010999999. The next prime is 61000011000059. The reversal of 61000011000019 is 91000011000016.

It is not a de Polignac number, because 61000011000019 - 2³⁷ = 60862572046547 is a prime.

It is a super-2 number, since 2×61000011000019² (a number of 28 digits) contains 22 as substring.

61000011000019 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61000011000059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91764189 + ... + 92426545.

It is an arithmetic number, because the mean of its divisors is an integer number (3145438788300).

Almost surely, 2^{61000011000019} is an apocalyptic number.

61000011000019 is a deficient number, since it is larger than the sum of its proper divisors (14490519919181).

61000011000019 is a wasteful number, since it uses less digits than its factorization.

61000011000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740239 (or 740226 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 19.

The spelling of 61000011000019 in words is "sixty-one trillion, eleven million, nineteen", and thus it is an aban number and an uban number.