61255620 has 72 divisors (see below), whose sum is σ = 195599040. Its totient is φ = 15474240.

The previous prime is 61255613. The next prime is 61255643. The reversal of 61255620 is 2655216.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5536 + ... + 12375.

Almost surely, 2^61255620 is an apocalyptic number.

61255620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61255620 is an abundant number, since it is smaller than the sum of its proper divisors (134343420).

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

61255620 is a wasteful number, since it uses less digits than its factorization.

61255620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17945 (or 17940 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 61255620 is about 7826.5969616430. The cubic root of 61255620 is about 394.1988140019.

The spelling of 61255620 in words is "sixty-one million, two hundred fifty-five thousand, six hundred twenty".