61061747554 has 4 divisors (see below), whose sum is σ = 91592621334. Its totient is φ = 30530873776.

The previous prime is 61061747533. The next prime is 61061747557. The reversal of 61061747554 is 45574716016.

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., 56052930025 + 5008817529 = 236755^2 + 70773^2 .

It is not an unprimeable number, because it can be changed into a prime (61061747557) by changing a digit.

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 as a sum of consecutive naturals, namely, 15265436887 + ... + 15265436890.

Almost surely, 2^61061747554 is an apocalyptic number.

61061747554 is a deficient number, since it is larger than the sum of its proper divisors (30530873780).

61061747554 is a wasteful number, since it uses less digits than its factorization.

61061747554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30530873779.

The product of its (nonzero) digits is 705600, while the sum is 46.

It can be divided in two parts, 610 and 61747554, that added together give a square (61748164 = 7858²).

The spelling of 61061747554 in words is "sixty-one billion, sixty-one million, seven hundred forty-seven thousand, five hundred fifty-four".