3913889345550 has 240 divisors, whose sum is σ = 11075500399392. Its totient is φ = 1024569907200.

The previous prime is 3913889345537. The next prime is 3913889345567. The reversal of 3913889345550 is 555439883193.

It is a happy number.

3913889345550 is a `hidden beast` number, since 3 + 9 + 1 + 38 + 8 + 9 + 3 + 45 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 66969942 + ... + 67028358.

Almost surely, 2^{3913889345550} is an apocalyptic number.

3913889345550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3913889345550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5537750199696).

3913889345550 is an abundant number, since it is smaller than the sum of its proper divisors (7161611053842).

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

3913889345550 is a wasteful number, since it uses less digits than its factorization.

3913889345550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58745 (or 58731 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 63.

The spelling of 3913889345550 in words is "three trillion, nine hundred thirteen billion, eight hundred eighty-nine million, three hundred forty-five thousand, five hundred fifty".