61542000442 has 8 divisors (see below), whose sum is σ = 99414000756. Its totient is φ = 28404000192.

The previous prime is 61542000431. The next prime is 61542000493. The reversal of 61542000442 is 24400024516.

It can be written as a sum of positive squares in 2 ways, for example, as 58273477201 + 3268523241 = 241399^2 + 57171^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 61542000442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183499983 + ... + 1183500034.

Almost surely, 2^61542000442 is an apocalyptic number.

61542000442 is a deficient number, since it is larger than the sum of its proper divisors (37872000314).

61542000442 is a wasteful number, since it uses less digits than its factorization.

61542000442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367000032.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 61542000442 its reverse (24400024516), we get a palindrome (85942024958).

The spelling of 61542000442 in words is "sixty-one billion, five hundred forty-two million, four hundred forty-two", and thus it is an aban number.