2128431152265 has 48 divisors (see below), whose sum is σ = 3752229953088. Its totient is φ = 1021748320000.

The previous prime is 2128431152219. The next prime is 2128431152311. The reversal of 2128431152265 is 5622511348212.

It is an interprime number because it is at equal distance from previous prime (2128431152219) and next prime (2128431152311).

It is not a de Polignac number, because 2128431152265 - 2¹⁵ = 2128431119497 is a prime.

It is a super-2 number, since 2×2128431152265² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1050895 + ... + 2315435.

It is an arithmetic number, because the mean of its divisors is an integer number (78171457356).

Almost surely, 2^{2128431152265} is an apocalyptic number.

It is an amenable number.

2128431152265 is a deficient number, since it is larger than the sum of its proper divisors (1623798800823).

2128431152265 is a wasteful number, since it uses less digits than its factorization.

2128431152265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264762 (or 1264661 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The spelling of 2128431152265 in words is "two trillion, one hundred twenty-eight billion, four hundred thirty-one million, one hundred fifty-two thousand, two hundred sixty-five".