2651020161 has 4 divisors (see below), whose sum is σ = 3534693552. Its totient is φ = 1767346772.

The previous prime is 2651020159. The next prime is 2651020187. The reversal of 2651020161 is 1610201562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2651020161 - 2¹ = 2651020159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2651020111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441836691 + ... + 441836696.

It is an arithmetic number, because the mean of its divisors is an integer number (883673388).

Almost surely, 2^2651020161 is an apocalyptic number.

It is an amenable number.

2651020161 is a deficient number, since it is larger than the sum of its proper divisors (883673391).

2651020161 is an equidigital number, since it uses as much as digits as its factorization.

2651020161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883673390.

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

The square root of 2651020161 is about 51488.0584310576. The cubic root of 2651020161 is about 1384.0050565668.

The spelling of 2651020161 in words is "two billion, six hundred fifty-one million, twenty thousand, one hundred sixty-one".