2501974188169 has 9 divisors (see below), whose sum is σ = 2506085604967. Its totient is φ = 2497869513184.

The previous prime is 2501974188157. The next prime is 2501974188173. The reversal of 2501974188169 is 9618814791052.

The square root of 2501974188169 is 1581763.

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., 2340762302025 + 161211886144 = 1529955^2 + 401512^2 .

It is not a de Polignac number, because 2501974188169 - 2³⁵ = 2467614449801 is a prime.

It is a super-2 number, since 2×2501974188169² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501974188269) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1545381642 + ... + 1545383260.

Almost surely, 2^{2501974188169} is an apocalyptic number.

2501974188169 is the 1581763-rd square number.

2501974188169 is the 790882-nd centered octagonal number.

It is an amenable number.

2501974188169 is a deficient number, since it is larger than the sum of its proper divisors (4111416798).

2501974188169 is an frugal number, since it uses more digits than its factorization.

2501974188169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 61.

The spelling of 2501974188169 in words is "two trillion, five hundred one billion, nine hundred seventy-four million, one hundred eighty-eight thousand, one hundred sixty-nine".