2142578700025 has 27 divisors (see below), whose sum is σ = 2674327390221. Its totient is φ = 1702827176640.

The previous prime is 2142578700001. The next prime is 2142578700029. The reversal of 2142578700025 is 5200078752412.

The square root of 2142578700025 is 1463755.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1013060367081 + 1129518332944 = 1006509^2 + 1062788^2 .

It is not a de Polignac number, because 2142578700025 - 2⁷ = 2142578699897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142578700029) 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, 1222234549 + ... + 1222236301.

Almost surely, 2^{2142578700025} is an apocalyptic number.

2142578700025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2142578700025 is the 1463755-th square number.

2142578700025 is the 731878-th centered octagonal number.

It is an amenable number.

2142578700025 is a deficient number, since it is larger than the sum of its proper divisors (531748690196).

2142578700025 is an frugal number, since it uses more digits than its factorization.

2142578700025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850 (or 1925 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 43.

The spelling of 2142578700025 in words is "two trillion, one hundred forty-two billion, five hundred seventy-eight million, seven hundred thousand, twenty-five".