2506021161 has 48 divisors (see below), whose sum is σ = 3957361344. Its totient is φ = 1406232576.

The previous prime is 2506021157. The next prime is 2506021237. The reversal of 2506021161 is 1611206052.

It is not a de Polignac number, because 2506021161 - 2² = 2506021157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2506021061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3723321 + ... + 3723993.

It is an arithmetic number, because the mean of its divisors is an integer number (82445028).

Almost surely, 2^2506021161 is an apocalyptic number.

2506021161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2506021161 is a deficient number, since it is larger than the sum of its proper divisors (1451340183).

2506021161 is a wasteful number, since it uses less digits than its factorization.

2506021161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 2506021161 is about 50060.1753992133. The cubic root of 2506021161 is about 1358.2975310807.

The spelling of 2506021161 in words is "two billion, five hundred six million, twenty-one thousand, one hundred sixty-one".