2651871849 has 32 divisors (see below), whose sum is σ = 3928403328. Its totient is φ = 1577664000.

The previous prime is 2651871839. The next prime is 2651871931. The reversal of 2651871849 is 9481781562.

It is not a de Polignac number, because 2651871849 - 2⁷ = 2651871721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2651871839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1329597 + ... + 1331589.

It is an arithmetic number, because the mean of its divisors is an integer number (122762604).

Almost surely, 2^2651871849 is an apocalyptic number.

It is an amenable number.

2651871849 is a deficient number, since it is larger than the sum of its proper divisors (1276531479).

2651871849 is a wasteful number, since it uses less digits than its factorization.

2651871849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729.

The product of its digits is 967680, while the sum is 51.

The square root of 2651871849 is about 51496.3285001950. The cubic root of 2651871849 is about 1384.1532528861.

The spelling of 2651871849 in words is "two billion, six hundred fifty-one million, eight hundred seventy-one thousand, eight hundred forty-nine".