55745421312 has 224 divisors, whose sum is σ = 170689365504. Its totient is φ = 15851520000.

The previous prime is 55745421311. The next prime is 55745421313. The reversal of 55745421312 is 21312454755.

It is an interprime number because it is at equal distance from previous prime (55745421311) and next prime (55745421313).

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (55745421311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43179387 + ... + 43180677.

It is an arithmetic number, because the mean of its divisors is an integer number (762006096).

Almost surely, 2^55745421312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55745421312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85344682752).

55745421312 is an abundant number, since it is smaller than the sum of its proper divisors (114943944192).

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

55745421312 is a wasteful number, since it uses less digits than its factorization.

55745421312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1554 counting only the distinct ones).

The product of its digits is 168000, while the sum is 39.

The spelling of 55745421312 in words is "fifty-five billion, seven hundred forty-five million, four hundred twenty-one thousand, three hundred twelve".