61543144452 has 24 divisors (see below), whose sum is σ = 143672419296. Its totient is φ = 20504131648.

The previous prime is 61543144417. The next prime is 61543144457. The reversal of 61543144452 is 25444134516.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61543144452.

It is not an unprimeable number, because it can be changed into a prime (61543144457) 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, 1256193 + ... + 1304264.

It is an arithmetic number, because the mean of its divisors is an integer number (5986350804).

Almost surely, 2^61543144452 is an apocalyptic number.

It is an amenable number.

61543144452 is an abundant number, since it is smaller than the sum of its proper divisors (82129274844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61543144452 is a wasteful number, since it uses less digits than its factorization.

61543144452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562467 (or 2562465 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

Adding to 61543144452 its reverse (25444134516), we get a palindrome (86987278968).

The spelling of 61543144452 in words is "sixty-one billion, five hundred forty-three million, one hundred forty-four thousand, four hundred fifty-two".