2157628777139 has 8 divisors (see below), whose sum is σ = 2353830133680. Its totient is φ = 1961436301600.

The previous prime is 2157628777123. The next prime is 2157628777151. The reversal of 2157628777139 is 9317778267512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2157628777139 - 2⁴ = 2157628777123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157628777639) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1707104 + ... + 2688765.

It is an arithmetic number, because the mean of its divisors is an integer number (294228766710).

Almost surely, 2^{2157628777139} is an apocalyptic number.

2157628777139 is a deficient number, since it is larger than the sum of its proper divisors (196201356541).

2157628777139 is a wasteful number, since it uses less digits than its factorization.

2157628777139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440501.

The product of its digits is 62233920, while the sum is 65.

The spelling of 2157628777139 in words is "two trillion, one hundred fifty-seven billion, six hundred twenty-eight million, seven hundred seventy-seven thousand, one hundred thirty-nine".