61244019599 has 16 divisors (see below), whose sum is σ = 71432448000. Its totient is φ = 52486899192.

The previous prime is 61244019589. The next prime is 61244019623. The reversal of 61244019599 is 99591044216.

It is not a de Polignac number, because 61244019599 - 2²⁴ = 61227242383 is a prime.

It is a super-2 number, since 2×61244019599² (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 (61244019559) 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 15 ways as a sum of consecutive naturals, for example, 3847034 + ... + 3862920.

It is an arithmetic number, because the mean of its divisors is an integer number (4464528000).

Almost surely, 2^61244019599 is an apocalyptic number.

61244019599 is a deficient number, since it is larger than the sum of its proper divisors (10188428401).

61244019599 is a wasteful number, since it uses less digits than its factorization.

61244019599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27147 (or 27133 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 61244019599 in words is "sixty-one billion, two hundred forty-four million, nineteen thousand, five hundred ninety-nine".