2139387385850 has 192 divisors, whose sum is σ = 4855369236480. Its totient is φ = 690918086400.

The previous prime is 2139387385769. The next prime is 2139387385859. The reversal of 2139387385850 is 585837839312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2139387385859) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19772999 + ... + 19880901.

It is an arithmetic number, because the mean of its divisors is an integer number (25288381440).

Almost surely, 2^{2139387385850} is an apocalyptic number.

2139387385850 is an abundant number, since it is smaller than the sum of its proper divisors (2715981850630).

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

2139387385850 is a wasteful number, since it uses less digits than its factorization.

2139387385850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108045 (or 108040 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 62.

The spelling of 2139387385850 in words is "two trillion, one hundred thirty-nine billion, three hundred eighty-seven million, three hundred eighty-five thousand, eight hundred fifty".