61855800 has 48 divisors (see below), whose sum is σ = 191754840. Its totient is φ = 16494720.

The previous prime is 61855799. The next prime is 61855813. The reversal of 61855800 is 855816.

It is a super-2 number, since 2×61855800² = 7652279987280000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50947 + ... + 52146.

Almost surely, 2^61855800 is an apocalyptic number.

61855800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61855800 is an abundant number, since it is smaller than the sum of its proper divisors (129899040).

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

61855800 is a wasteful number, since it uses less digits than its factorization.

61855800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103112 (or 103103 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 61855800 is about 7864.8458344713. The cubic root of 61855800 is about 395.4820797797.

The spelling of 61855800 in words is "sixty-one million, eight hundred fifty-five thousand, eight hundred".