2156774467 has 2 divisors, whose sum is σ = 2156774468. Its totient is φ = 2156774466.

The previous prime is 2156774453. The next prime is 2156774491. The reversal of 2156774467 is 7644776512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156774467 is a prime.

It is a super-2 number, since 2×2156774467² = 9303352203006268178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2156774467.

It is not a weakly prime, because it can be changed into another prime (2156774407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078387233 + 1078387234.

It is an arithmetic number, because the mean of its divisors is an integer number (1078387234).

Almost surely, 2^2156774467 is an apocalyptic number.

2156774467 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156774467 is an equidigital number, since it uses as much as digits as its factorization.

2156774467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 49.

The square root of 2156774467 is about 46441.0859799811. The cubic root of 2156774467 is about 1292.0170490055.

The spelling of 2156774467 in words is "two billion, one hundred fifty-six million, seven hundred seventy-four thousand, four hundred sixty-seven".