61003561044 has 48 divisors (see below), whose sum is σ = 142647257088. Its totient is φ = 20290914528.

The previous prime is 61003561019. The next prime is 61003561051. The reversal of 61003561044 is 44016530016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13533039 + ... + 13537545.

It is an arithmetic number, because the mean of its divisors is an integer number (2971817856).

Almost surely, 2^61003561044 is an apocalyptic number.

It is an amenable number.

61003561044 is an abundant number, since it is smaller than the sum of its proper divisors (81643696044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61003561044 is a wasteful number, since it uses less digits than its factorization.

61003561044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684 (or 6682 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 61003561044 in words is "sixty-one billion, three million, five hundred sixty-one thousand, forty-four".