2139049577401 has 27 divisors (see below), whose sum is σ = 2430044638959. Its totient is φ = 1881423033600.

The previous prime is 2139049577389. The next prime is 2139049577411. The reversal of 2139049577401 is 1047759409312.

The square root of 2139049577401 is 1462549.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2013280047801 + 125769529600 = 1418901^2 + 354640^2 .

It is not a de Polignac number, because 2139049577401 - 2⁵ = 2139049577369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139049577411) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 498727065 + ... + 498731353.

Almost surely, 2^{2139049577401} is an apocalyptic number.

2139049577401 is the 1462549-th square number.

2139049577401 is the 731275-th centered octagonal number.

It is an amenable number.

2139049577401 is a deficient number, since it is larger than the sum of its proper divisors (290995061558).

2139049577401 is an frugal number, since it uses more digits than its factorization.

2139049577401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662 (or 4331 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 2139049577401 in words is "two trillion, one hundred thirty-nine billion, forty-nine million, five hundred seventy-seven thousand, four hundred one".