2125461151561 has 6 divisors (see below), whose sum is σ = 2336250687386. Its totient is φ = 1932237410400.

The previous prime is 2125461151559. The next prime is 2125461151577. The reversal of 2125461151561 is 1651511645212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2006698896400 + 118762255161 = 1416580^2 + 344619^2 .

It is not a de Polignac number, because 2125461151561 - 2¹ = 2125461151559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125461154561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8782897200 + ... + 8782897441.

Almost surely, 2^{2125461151561} is an apocalyptic number.

It is an amenable number.

2125461151561 is a deficient number, since it is larger than the sum of its proper divisors (210789535825).

2125461151561 is a wasteful number, since it uses less digits than its factorization.

2125461151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17565794663 (or 17565794652 counting only the distinct ones).

The product of its digits is 72000, while the sum is 40.

Adding to 2125461151561 its reverse (1651511645212), we get a palindrome (3776972796773).

The spelling of 2125461151561 in words is "two trillion, one hundred twenty-five billion, four hundred sixty-one million, one hundred fifty-one thousand, five hundred sixty-one".