61261835044 has 6 divisors (see below), whose sum is σ = 107208211334. Its totient is φ = 30630917520.

The previous prime is 61261835039. The next prime is 61261835057. The reversal of 61261835044 is 44053816216.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50391270400 + 10870564644 = 224480^2 + 104262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61261834988 and 61261835006.

It is an unprimeable number.

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, 7657729377 + ... + 7657729384.

Almost surely, 2^61261835044 is an apocalyptic number.

It is an amenable number.

61261835044 is a deficient number, since it is larger than the sum of its proper divisors (45946376290).

61261835044 is a wasteful number, since it uses less digits than its factorization.

61261835044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15315458765 (or 15315458763 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 61261835044 in words is "sixty-one billion, two hundred sixty-one million, eight hundred thirty-five thousand, forty-four".