61165650580 has 24 divisors (see below), whose sum is σ = 128980855080. Its totient is φ = 24364738560.

The previous prime is 61165650577. The next prime is 61165650583. The reversal of 61165650580 is 8505656116.

It is an interprime number because it is at equal distance from previous prime (61165650577) and next prime (61165650583).

It can be written as a sum of positive squares in 4 ways, for example, as 16358921604 + 44806728976 = 127902^2 + 211676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61165650583) 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 in 7 ways as a sum of consecutive naturals, for example, 6340165 + ... + 6349804.

It is an arithmetic number, because the mean of its divisors is an integer number (5374202295).

Almost surely, 2^61165650580 is an apocalyptic number.

It is an amenable number.

61165650580 is an abundant number, since it is smaller than the sum of its proper divisors (67815204500).

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

61165650580 is a wasteful number, since it uses less digits than its factorization.

61165650580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12690219 (or 12690217 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 61165650580 in words is "sixty-one billion, one hundred sixty-five million, six hundred fifty thousand, five hundred eighty".