61864459519 has 8 divisors (see below), whose sum is σ = 62217446400. Its totient is φ = 61511894136.

The previous prime is 61864459471. The next prime is 61864459561. The reversal of 61864459519 is 91595446816.

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 61864459519 - 2¹⁷ = 61864328447 is a prime.

It is a super-2 number, since 2×61864459519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61864457519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191382 + ... + 400444.

It is an arithmetic number, because the mean of its divisors is an integer number (7777180800).

Almost surely, 2^61864459519 is an apocalyptic number.

61864459519 is a deficient number, since it is larger than the sum of its proper divisors (352986881).

61864459519 is a wasteful number, since it uses less digits than its factorization.

61864459519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210749.

The product of its digits is 9331200, while the sum is 58.

The spelling of 61864459519 in words is "sixty-one billion, eight hundred sixty-four million, four hundred fifty-nine thousand, five hundred nineteen".