2156100263425 has 12 divisors (see below), whose sum is σ = 2673637691836. Its totient is φ = 1724832878400.

The previous prime is 2156100263407. The next prime is 2156100263459. The reversal of 2156100263425 is 5243620016512.

It can be written as a sum of positive squares in 6 ways, for example, as 455256524529 + 1700843738896 = 674727^2 + 1304164^2 .

It is not a de Polignac number, because 2156100263425 - 2⁷ = 2156100263297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239274 + ... + 2090323.

Almost surely, 2^{2156100263425} is an apocalyptic number.

2156100263425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2156100263425 is a deficient number, since it is larger than the sum of its proper divisors (517537428411).

2156100263425 is a wasteful number, since it uses less digits than its factorization.

2156100263425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366628 (or 2366623 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 2156100263425 its reverse (5243620016512), we get a palindrome (7399720279937).

The spelling of 2156100263425 in words is "two trillion, one hundred fifty-six billion, one hundred million, two hundred sixty-three thousand, four hundred twenty-five".