61533244619 has 64 divisors (see below), whose sum is σ = 79009136640. Its totient is φ = 46543200000.

The previous prime is 61533244613. The next prime is 61533244631. The reversal of 61533244619 is 91644233516.

It is not a de Polignac number, because 61533244619 - 2³² = 57238277323 is a prime.

It is a super-2 number, since 2×61533244619² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61533244619.

It is not an unprimeable number, because it can be changed into a prime (61533244613) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142768334 + ... + 142768764.

It is an arithmetic number, because the mean of its divisors is an integer number (1234517760).

Almost surely, 2^61533244619 is an apocalyptic number.

61533244619 is a deficient number, since it is larger than the sum of its proper divisors (17475892021).

61533244619 is a wasteful number, since it uses less digits than its factorization.

61533244619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872.

The product of its digits is 466560, while the sum is 44.

The spelling of 61533244619 in words is "sixty-one billion, five hundred thirty-three million, two hundred forty-four thousand, six hundred nineteen".