61550220752 has 20 divisors (see below), whose sum is σ = 123100442496. Its totient is φ = 29782364640.

The previous prime is 61550220733. The next prime is 61550220763. The reversal of 61550220752 is 25702205516.

61550220752 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 62046098 + ... + 62047089.

Almost surely, 2^61550220752 is an apocalyptic number.

61550220752 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

61550220752 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61550220752 is a wasteful number, since it uses less digits than its factorization.

61550220752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124093226 (or 124093220 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 61550220752 in words is "sixty-one billion, five hundred fifty million, two hundred twenty thousand, seven hundred fifty-two".