61146912819 has 8 divisors (see below), whose sum is σ = 82511497152. Its totient is φ = 40273468520.

The previous prime is 61146912809. The next prime is 61146912851. The reversal of 61146912819 is 91821964116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61146912819 - 2⁷ = 61146912691 is a prime.

It is a super-2 number, since 2×61146912819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61146912809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122784717 + ... + 122785214.

It is an arithmetic number, because the mean of its divisors is an integer number (10313937144).

Almost surely, 2^61146912819 is an apocalyptic number.

61146912819 is a deficient number, since it is larger than the sum of its proper divisors (21364584333).

61146912819 is a wasteful number, since it uses less digits than its factorization.

61146912819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245570017.

The product of its digits is 186624, while the sum is 48.

The spelling of 61146912819 in words is "sixty-one billion, one hundred forty-six million, nine hundred twelve thousand, eight hundred nineteen".