881645651 has 2 divisors, whose sum is σ = 881645652. Its totient is φ = 881645650.

The previous prime is 881645539. The next prime is 881645689. The reversal of 881645651 is 156546188.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 881645651 - 2¹⁴ = 881629267 is a prime.

It is not a weakly prime, because it can be changed into another prime (881645351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440822825 + 440822826.

It is an arithmetic number, because the mean of its divisors is an integer number (440822826).

Almost surely, 2^881645651 is an apocalyptic number.

881645651 is a deficient number, since it is larger than the sum of its proper divisors (1).

881645651 is an equidigital number, since it uses as much as digits as its factorization.

881645651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 44.

The square root of 881645651 is about 29692.5184347842. The cubic root of 881645651 is about 958.8809482944.

The spelling of 881645651 in words is "eight hundred eighty-one million, six hundred forty-five thousand, six hundred fifty-one".