1561010050042 has 4 divisors (see below), whose sum is σ = 2341515075066. Its totient is φ = 780505025020.

The previous prime is 1561010050003. The next prime is 1561010050043. The reversal of 1561010050042 is 2400500101651.

It is a happy number.

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., 1435877354961 + 125132695081 = 1198281^2 + 353741^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1561010049989 and 1561010050016.

It is not an unprimeable number, because it can be changed into a prime (1561010050043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390252512509 + ... + 390252512512.

Almost surely, 2^{1561010050042} is an apocalyptic number.

1561010050042 is a deficient number, since it is larger than the sum of its proper divisors (780505025024).

1561010050042 is an equidigital number, since it uses as much as digits as its factorization.

1561010050042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780505025023.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 1561010050042 its reverse (2400500101651), we get a palindrome (3961510151693).

The spelling of 1561010050042 in words is "one trillion, five hundred sixty-one billion, ten million, fifty thousand, forty-two".