2025666405531 has 12 divisors (see below), whose sum is σ = 2938852291752. Its totient is φ = 1344495175296.

The previous prime is 2025666405457. The next prime is 2025666405547. The reversal of 2025666405531 is 1355046665202.

It is not a de Polignac number, because 2025666405531 - 2⁹ = 2025666405019 is a prime.

It is a super-2 number, since 2×2025666405531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2025666405551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495755766 + ... + 495759851.

It is an arithmetic number, because the mean of its divisors is an integer number (244904357646).

Almost surely, 2^{2025666405531} is an apocalyptic number.

2025666405531 is a deficient number, since it is larger than the sum of its proper divisors (913185886221).

2025666405531 is a wasteful number, since it uses less digits than its factorization.

2025666405531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991515850 (or 991515847 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 2025666405531 in words is "two trillion, twenty-five billion, six hundred sixty-six million, four hundred five thousand, five hundred thirty-one".