61030980728 has 32 divisors (see below), whose sum is σ = 114955545600. Its totient is φ = 30376267488.

The previous prime is 61030980727. The next prime is 61030980749. The reversal of 61030980728 is 82708903016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61030980727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7381925 + ... + 7390187.

It is an arithmetic number, because the mean of its divisors is an integer number (3592360800).

Almost surely, 2^61030980728 is an apocalyptic number.

It is an amenable number.

61030980728 is a deficient number, since it is larger than the sum of its proper divisors (53924564872).

61030980728 is a wasteful number, since it uses less digits than its factorization.

61030980728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12371 (or 12367 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 61030980728 in words is "sixty-one billion, thirty million, nine hundred eighty thousand, seven hundred twenty-eight".