55791448650 has 576 divisors, whose sum is σ = 187485143040. Its totient is φ = 11936937600.

The previous prime is 55791448649. The next prime is 55791448717. The reversal of 55791448650 is 5684419755.

It is a happy number.

55791448650 is a `hidden beast` number, since 5 + 57 + 91 + 448 + 65 + 0 = 666.

It is a super-2 number, since 2×55791448650² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 541664499 + ... + 541664601.

It is an arithmetic number, because the mean of its divisors is an integer number (325495040).

Almost surely, 2^55791448650 is an apocalyptic number.

55791448650 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 55791448650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93742571520).

55791448650 is an abundant number, since it is smaller than the sum of its proper divisors (131693694390).

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

55791448650 is a wasteful number, since it uses less digits than its factorization.

55791448650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 55791448650 in words is "fifty-five billion, seven hundred ninety-one million, four hundred forty-eight thousand, six hundred fifty".