61149552580 has 48 divisors (see below), whose sum is σ = 130096834560. Its totient is φ = 24141293568.

The previous prime is 61149552571. The next prime is 61149552589. The reversal of 61149552580 is 8525594116.

It is an interprime number because it is at equal distance from previous prime (61149552571) and next prime (61149552589).

It is a self number, because there is not a number n which added to its sum of digits gives 61149552580.

It is not an unprimeable number, because it can be changed into a prime (61149552589) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 427851 + ... + 552589.

It is an arithmetic number, because the mean of its divisors is an integer number (2710350720).

Almost surely, 2^61149552580 is an apocalyptic number.

It is an amenable number.

61149552580 is an abundant number, since it is smaller than the sum of its proper divisors (68947281980).

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

61149552580 is a wasteful number, since it uses less digits than its factorization.

61149552580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125068 (or 125066 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 46.

The spelling of 61149552580 in words is "sixty-one billion, one hundred forty-nine million, five hundred fifty-two thousand, five hundred eighty".