2125494756637 has 6 divisors (see below), whose sum is σ = 2472514308798. Its totient is φ = 1821852648504.

The previous prime is 2125494756611. The next prime is 2125494756743. The reversal of 2125494756637 is 7366574945212.

It can be written as a sum of positive squares in only one way, i.e., 2116614709881 + 8880046756 = 1454859^2 + 94234^2 .

It is not a de Polignac number, because 2125494756637 - 2⁷ = 2125494756509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125494753637) 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, 21688721958 + ... + 21688722055.

It is an arithmetic number, because the mean of its divisors is an integer number (412085718133).

Almost surely, 2^{2125494756637} is an apocalyptic number.

It is an amenable number.

2125494756637 is a deficient number, since it is larger than the sum of its proper divisors (347019552161).

2125494756637 is an equidigital number, since it uses as much as digits as its factorization.

2125494756637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43377444027 (or 43377444020 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 61.

The spelling of 2125494756637 in words is "two trillion, one hundred twenty-five billion, four hundred ninety-four million, seven hundred fifty-six thousand, six hundred thirty-seven".