2139742512 has 120 divisors (see below), whose sum is σ = 6224899200. Its totient is φ = 685393920.

The previous prime is 2139742499. The next prime is 2139742531. The reversal of 2139742512 is 2152479312.

2139742512 is a `hidden beast` number, since 2 + 13 + 97 + 42 + 512 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 663528 + ... + 666744.

It is an arithmetic number, because the mean of its divisors is an integer number (51874160).

Almost surely, 2^2139742512 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 2139742512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3112449600).

2139742512 is an abundant number, since it is smaller than the sum of its proper divisors (4085156688).

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

2139742512 is a wasteful number, since it uses less digits than its factorization.

2139742512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411 (or 3402 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2139742512 is about 46257.3508969115. The cubic root of 2139742512 is about 1288.6070560201.

The spelling of 2139742512 in words is "two billion, one hundred thirty-nine million, seven hundred forty-two thousand, five hundred twelve".