2139724177788 has 24 divisors (see below), whose sum is σ = 4992714345808. Its totient is φ = 713237878656.

The previous prime is 2139724177621. The next prime is 2139724177823. The reversal of 2139724177788 is 8877714279312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3539670 + ... + 4099842.

Almost surely, 2^{2139724177788} is an apocalyptic number.

It is an amenable number.

2139724177788 is an abundant number, since it is smaller than the sum of its proper divisors (2852990168020).

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

2139724177788 is a wasteful number, since it uses less digits than its factorization.

2139724177788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878493 (or 878491 counting only the distinct ones).

The product of its digits is 66382848, while the sum is 66.

The spelling of 2139724177788 in words is "two trillion, one hundred thirty-nine billion, seven hundred twenty-four million, one hundred seventy-seven thousand, seven hundred eighty-eight".