3859486991550 has 240 divisors, whose sum is σ = 10959798673824. Its totient is φ = 1006719840000.

The previous prime is 3859486991531. The next prime is 3859486991579. The reversal of 3859486991550 is 551996849583.

3859486991550 is a `hidden beast` number, since 3 + 8 + 5 + 9 + 4 + 8 + 69 + 9 + 1 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 44672895 + ... + 44759205.

Almost surely, 2^{3859486991550} is an apocalyptic number.

3859486991550 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 3859486991550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5479899336912).

3859486991550 is an abundant number, since it is smaller than the sum of its proper divisors (7100311682274).

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

3859486991550 is a wasteful number, since it uses less digits than its factorization.

3859486991550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86577 (or 86563 counting only the distinct ones).

The product of its (nonzero) digits is 419904000, while the sum is 72.

The spelling of 3859486991550 in words is "three trillion, eight hundred fifty-nine billion, four hundred eighty-six million, nine hundred ninety-one thousand, five hundred fifty".