55773797850 has 144 divisors (see below), whose sum is σ = 153721196928. Its totient is φ = 14491192320.

The previous prime is 55773797843. The next prime is 55773797851. The reversal of 55773797850 is 5879737755.

55773797850 is a `hidden beast` number, since 5 + 577 + 3 + 7 + 9 + 7 + 8 + 50 = 666.

It is a super-2 number, since 2×55773797850² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55773797851) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4795242 + ... + 4806858.

It is an arithmetic number, because the mean of its divisors is an integer number (1067508312).

Almost surely, 2^55773797850 is an apocalyptic number.

55773797850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55773797850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76860598464).

55773797850 is an abundant number, since it is smaller than the sum of its proper divisors (97947399078).

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

55773797850 is a wasteful number, since it uses less digits than its factorization.

55773797850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11909 (or 11901 counting only the distinct ones).

The product of its (nonzero) digits is 64827000, while the sum is 63.

The spelling of 55773797850 in words is "fifty-five billion, seven hundred seventy-three million, seven hundred ninety-seven thousand, eight hundred fifty".