61010000042 has 4 divisors (see below), whose sum is σ = 91515000066. Its totient is φ = 30505000020.

The previous prime is 61010000041. The next prime is 61010000047. The reversal of 61010000042 is 24000001016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55186936561 + 5823063481 = 234919^2 + 76309^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61009999981 and 61010000026.

It is not an unprimeable number, because it can be changed into a prime (61010000041) 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 as a sum of consecutive naturals, namely, 15252500009 + ... + 15252500012.

Almost surely, 2^61010000042 is an apocalyptic number.

61010000042 is a deficient number, since it is larger than the sum of its proper divisors (30505000024).

61010000042 is a wasteful number, since it uses less digits than its factorization.

61010000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30505000023.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 61010000042 its reverse (24000001016), we get a palindrome (85010001058).

The spelling of 61010000042 in words is "sixty-one billion, ten million, forty-two", and thus it is an aban number and an uban number.